Sieve Collection

Smooth, sheer and supportive in one perfect power micro mesh.

Sieve Collection

Smooth, sheer and supportive in one perfect power micro mesh.

Sieve Longline Bra in Buff + WhiteSieve Longline Bra in Buff + White (alternate view)

Sieve Longline Bra in Buff + White

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Longline Bra in Buff + White$70
Available in 3 colors
Sieve High Brief in Buff + WhiteSieve High Brief in Buff + White (alternate view)

Sieve High Brief in Buff + White

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve High Brief in Buff + White$50
Available in 2 colors
Sieve Triangle Bra in Buff + WhiteSieve Triangle Bra in Buff + White (alternate view)

Sieve Non-Wire Bra in Babe

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Triangle Bra in Buff + White$70+
Available in 9 colors
Sieve Thong in Buff + WhiteSieve Thong in Buff + White (alternate view)

Sieve Thong in Glacier

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Buff + White$32+
Available in 15 colors
Sieve Cutout Bra in Buff + WhiteSieve Cutout Bra in Buff + White (alternate view)

Glacé Triangle Bra in Navy

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Cutout Bra in Buff + White$70+
Available in 12 colors
Sieve String Thong in Buff + WhiteSieve String Thong in Buff + White (alternate view)

Sieve String Thong in Buff + White

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve String Thong in Buff + White$30
Available in 7 colors
Sieve Triangle Bra in GlacierSieve Triangle Bra in Glacier (alternate view)

Supreme Mini Slip Dress in Cloud Stripe

Size
Color
Quantity
Size Chart

Apparel Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Triangle Bra in Glacier$70+
Available in 9 colors
Sieve Thong in GlacierSieve Thong in Glacier (alternate view)

Sieve Thong in Glacier

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Glacier$32+
Available in 15 colors
Sieve Longline Bra in BlackSieve Longline Bra in Black (alternate view)

Sieve Longline Bra in Black

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Longline Bra in Black$70
Available in 3 colors
Sieve High Brief in BlackSieve High Brief in Black (alternate view)

Cloud Cotton French Cut Brief in Honey (Pack)

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve High Brief in Black$50
Available in 2 colors
Low Stock
Sieve Non-Wire Bra in BlackSieve Non-Wire Bra in Black (alternate view)

Sieve Non-Wire Bra in Black

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Non-Wire Bra in Black$70+
Available in 11 colors
Sieve Dipped Thong in BlackSieve Dipped Thong in Black (alternate view)

Sieve Dipped Thong in Black

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Dipped Thong in Black$35
Available in 5 colors
Sieve Racerback Bra in BabeSieve Racerback Bra in Babe (alternate view)

Supreme Mini Slip Dress in Cloud Stripe

Size
Color
Quantity
Size Chart

Apparel Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Racerback Bra in Babe$70+
Available in 6 colors
Sieve String Thong in BabeSieve String Thong in Babe (alternate view)

Sieve Thong in Glacier

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve String Thong in Babe$30
Available in 7 colors
Sieve Longline Bra in BabeSieve Longline Bra in Babe (alternate view)

Sieve Longline Bra in Babe

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Longline Bra in Babe$70
Available in 3 colors
Sieve Thong in BabeSieve Thong in Babe (alternate view)

Sieve Thong in Babe

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Babe$32+
Available in 15 colors
Sieve Cutout Bra in VioletSieve Cutout Bra in Violet (alternate view)

Supreme Mini Slip Dress in Cloud Stripe

Size
Color
Quantity
Size Chart

Apparel Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Cutout Bra in Violet$70+
Available in 12 colors
Sieve Dipped Thong in VioletSieve Dipped Thong in Violet (alternate view)

Sieve Dipped Thong in Buff

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Dipped Thong in Violet$35
Available in 5 colors
Sieve Racerback Bra in OrchidSieve Racerback Bra in Orchid (alternate view)

Sieve Racerback Bra in Orchid

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Racerback Bra in Orchid$70+
Available in 6 colors
Sieve Thong in OrchidSieve Thong in Orchid (alternate view)

Sieve Thong in Glacier

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Orchid$32+
Available in 15 colors
Sieve Racerback Bra in BuffSieve Racerback Bra in Buff (alternate view)

Sieve Racerback Bra in Buff

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Racerback Bra in Buff$70+
Available in 6 colors
Sieve Thong in BuffSieve Thong in Buff (alternate view)

Sieve Thong in Glacier

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Buff$32+
Available in 15 colors
Sieve Non-Wire Bra in BabeSieve Non-Wire Bra in Babe (alternate view)

Sieve Non-Wire Bra in Babe

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Non-Wire Bra in Babe$70+
Available in 11 colors
Sieve Cutout Bra in CherrySieve Cutout Bra in Cherry (alternate view)

Sieve Cutout Bra in Cherry

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Cutout Bra in Cherry$70+
Available in 12 colors
Sieve Dipped Thong in CherrySieve Dipped Thong in Cherry (alternate view)

Sieve Thong in Glacier

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Dipped Thong in Cherry$35
Available in 5 colors
Sieve Cutout Bra in Bronze SparkSieve Cutout Bra in Bronze Spark (alternate view)

Sieve Cutout Bra in Bronze Spark

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Cutout Bra in Bronze Spark$70+
Available in 12 colors
Sieve Dipped Thong in Bronze SparkSieve Dipped Thong in Bronze Spark (alternate view)

Whipped French Cut Brief in Graphite

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Dipped Thong in Bronze Spark$35
Available in 5 colors
Sieve Cutout Bra in BlackSieve Cutout Bra in Black (alternate view)

Sieve Cutout Bra in Black

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Cutout Bra in Black$70+
Available in 12 colors
Sieve Thong in BlackSieve Thong in Black (alternate view)

Sieve Thong in Black

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Black$32+
Available in 15 colors
Sieve Brief in BlackSieve Brief in Black (alternate view)

Base Boy Short in Black (Pack)

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Brief in Black$35+
Available in 2 colors
Sieve Triangle Bra in NavySieve Triangle Bra in Navy (alternate view)

Sieve Bra Top in Buff + White

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Triangle Bra in Navy$70+
Available in 9 colors
Sieve String Thong in NavySieve String Thong in Navy (alternate view)

Sieve String Thong in Navy

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve String Thong in Navy$30
Available in 7 colors
Sieve Non-Wire Bra in BuffSieve Non-Wire Bra in Buff (alternate view)

Sieve Racerback Bra in Glacier

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Non-Wire Bra in Buff$70+
Available in 11 colors
Sieve Cutout Bra in BuffSieve Cutout Bra in Buff (alternate view)

Sieve Cutout Bra in Buff

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Cutout Bra in Buff$70+
Available in 12 colors
Sieve Brief in BuffSieve Brief in Buff (alternate view)

Base High Rise Brief in Buff (Pack)

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Brief in Buff$35+
Available in 2 colors
Sieve Triangle Bra in SlateSieve Triangle Bra in Slate (alternate view)

Glacé Baby Demi Bra in Black

Band
Cup
Color
Sieve Triangle Bra in Slate$70+
Available in 9 colors
Sieve Triangle Bra in BuffSieve Triangle Bra in Buff (alternate view)

Sieve Triangle Bra in Buff

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Triangle Bra in Buff$70+
Available in 9 colors
Sieve Bra Top in Buff + WhiteSieve Bra Top in Buff + White (alternate view)

Sieve Bra Top in Buff + White

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Bra Top in Buff + White$65+
Available in 5 colors
Sieve Non-Wire Bra in WhiteSieve Non-Wire Bra in White (alternate view)

Sieve Non-Wire Bra in Peach

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Non-Wire Bra in White$70+
Available in 11 colors
Sieve Thong in WhiteSieve Thong in White (alternate view)

Sieve Thong in White

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in White$32+
Available in 15 colors
Sieve Cutout Bra in NavySieve Cutout Bra in Navy (alternate view)

Glacé Baby Demi Bra in Black

Band
Cup
Color
Sieve Cutout Bra in Navy$70+
Available in 12 colors
Sieve Thong in NavySieve Thong in Navy (alternate view)

Sieve Thong in White

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Navy$32+
Available in 15 colors
Sieve Cutout Bra in GraphiteSieve Cutout Bra in Graphite (alternate view)

Sieve Bra Top in Buff + White

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Cutout Bra in Graphite$70+
Available in 12 colors
Sieve Thong in GraphiteSieve Thong in Graphite (alternate view)

Sieve Thong in Graphite

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Graphite$32+
Available in 15 colors
Sieve Cutout Bra in WhiteSieve Cutout Bra in White (alternate view)

Sieve Racerback Bra in Graphite

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Cutout Bra in White$70+
Available in 12 colors
Sieve String Thong in WhiteSieve String Thong in White (alternate view)

Silky Thong in Buff

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve String Thong in White$30
Available in 7 colors
Sieve Cutout Bra in SlateSieve Cutout Bra in Slate (alternate view)

Glacé Baby Demi Bra in Black

Band
Cup
Color
Sieve Cutout Bra in Slate$70+
Available in 12 colors
Sieve Thong in SlateSieve Thong in Slate (alternate view)

Whipped French Cut Brief in Graphite

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Slate$32+
Available in 15 colors
Sieve Non-Wire Bra in SlateSieve Non-Wire Bra in Slate (alternate view)

Sieve Bra Top in Buff + White

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Non-Wire Bra in Slate$70+
Available in 11 colors
Sieve High-Waist Brief in SlateSieve High-Waist Brief in Slate (alternate view)

Sieve High-Waist Brief in Slate

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve High-Waist Brief in Slate$45+
Available in 7 colors
Sieve Non-Wire Bra Custom 2-PackSieve Non-Wire Bra Custom 2-Pack (alternate view)

Sieve Non-Wire Bra Custom 2-Pack

Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Non-Wire Bra Custom 2-Pack$140 $119
Sieve Thong Custom 2-PackSieve Thong Custom 2-Pack (alternate view)

Sieve Thong Custom 2-Pack

Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong Custom 2-Pack$64 $54
Sieve Racerback Bra in GraphiteSieve Racerback Bra in Graphite (alternate view)

Sieve Racerback Bra in Graphite

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Racerback Bra in Graphite$70+
Available in 6 colors
Sieve Racerback Bra in BlackSieve Racerback Bra in Black (alternate view)

Sieve Bra Top in Buff + White

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Racerback Bra in Black$70+
Available in 6 colors
Sieve High-Waist Brief in BlackSieve High-Waist Brief in Black (alternate view)

Sieve High-Waist Brief in Black

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve High-Waist Brief in Black$45+
Available in 7 colors
Sieve String Thong in SparkSieve String Thong in Spark (alternate view)

Sieve Thong in Babe

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve String Thong in Spark$30
Available in 7 colors
Sieve String Thong in BuffSieve String Thong in Buff (alternate view)

Sieve String Thong in Buff

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve String Thong in Buff$30
Available in 7 colors
Shell Pasties in BabeShell Pasties in Babe (alternate view)

Shell Pasties in Babe

Color
Size
Quantity
Shell Pasties in Babe$25
Sieve Triangle Bra in PunchSieve Triangle Bra in Punch (alternate view)

Sieve Triangle Bra in Punch

Size
Color
Quantity
Size Chart

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Triangle Bra in Punch$70+
Available in 9 colors
Sieve Thong in PunchSieve Thong in Punch (alternate view)

Sieve Thong in Punch

Size
Color
Quantity
Size Chart

Underwear Sizing

Dress size: 0-2 2-4 6-8 10-12 12-14 16-18
Your full hip: 34.5-36" 36.5-38" 38.5-40.5" 41-42.5" 43-44.5" 45-46.5"
Negative size: XS S M L XL XXL

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Sieve Thong in Punch$32+
Available in 15 colors

When it comes to wireless bras with support, Sieve is our favorite fabric. Our Belgian power micromesh makes the most supportive bras, all the bulk of extra padding or lining. This fabric is as close as it comes to magic — it’s comfortable, smoothing, sexy and sheer, and does an incredible job providing lift and shape.

We make a variety of best support bras — starting with our #1 best selling style, our Sieve Non-Wire Bra. If you’re interested in wirefree comfort and a deep v plunge neckline, the Sieve Triangle Bra is the perfect match. Lastly, for our most supportive style, our Sieve Demi Bra provides the same airy light feel, with lots of support, and the extra shaping and lift of an underwire. These styles are beloved by DDD and G cups and from 30 to 42 bands. Don’t be fooled by their minimalist aesthetic, these bras do a lot with a little. Trust us, you’ll be surprised at the strength of a power micromesh ;) We sure were when we first discovered it, and today, these styles have over thousands of 5 star reviews for a reason.

Don’t forget to complete your set with our Sieve underwear bottoms — from high waist briefs to low rise thongs, we have a perfect match.

+ more