Non-Wire Bras

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

Non-Wire Bras

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

Sieve Racerback Bra in SeaSieve Racerback Bra in Sea (alternate view)
Sieve Racerback Bra in Sea
Sieve Racerback Bra in Sea
Sieve Racerback Bra in Sea

Sieve Racerback Bra in Sea

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.

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

Sieve Racerback Bra in Sea$70+
Available in 5 colors
Sieve Non-Wire Bra in SeaSieve Non-Wire Bra in Sea (alternate view)
Sieve Non-Wire Bra in Sea
Sieve Non-Wire Bra in Sea
Sieve Non-Wire Bra in Sea

Sieve Non-Wire Bra in Sea

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.

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

Sieve Non-Wire Bra in Sea$70+
Available in 10 colors
Sieve Cutout Bra in BuffSieve Cutout Bra in Buff (alternate view)
Sieve Cutout Bra in Buff
Sieve Cutout Bra in Buff
Sieve Cutout Bra in Buff
Sieve Cutout Bra in Buff$70+
Sieve Non-Wire Bra in BuffSieve Non-Wire Bra in Buff (alternate view)
Sieve Non-Wire Bra in Buff
Sieve Non-Wire Bra in Buff
Sieve Non-Wire Bra in Buff
Sieve Non-Wire Bra in Buff$70+
Sieve Triangle Bra in BuffSieve Triangle Bra in Buff (alternate view)
Sieve Triangle Bra in Buff
Sieve Triangle Bra in Buff
Sieve Triangle Bra in Buff
Sieve Triangle Bra in Buff$70+
Sieve Racerback Bra in BabeSieve Racerback Bra in Babe (alternate view)
Sieve Racerback Bra in Babe
Sieve Racerback Bra in Babe
Sieve Racerback Bra in Babe
Sieve Racerback Bra in Babe$70+
Sieve Non-Wire Bra in BabeSieve Non-Wire Bra in Babe (alternate view)
Sieve Non-Wire Bra in Babe
Sieve Non-Wire Bra in Babe
Sieve Non-Wire Bra in Babe
Sieve Non-Wire Bra in Babe$70+
Sieve Cutout Bra in BlackSieve Cutout Bra in Black (alternate view)
Sieve Cutout Bra in Black
Sieve Cutout Bra in Black
Sieve Cutout Bra in Black
Sieve Cutout Bra in Black$70+
Sieve Non-Wire Bra in Buff + WhiteSieve Non-Wire Bra in Buff + White (alternate view)
Sieve Non-Wire Bra in Buff + White
Sieve Non-Wire Bra in Buff + White
Sieve Non-Wire Bra in Buff + White
Sieve Non-Wire Bra in Buff + White$70+
Sieve Triangle Bra in Buff + WhiteSieve Triangle Bra in Buff + White (alternate view)
Sieve Triangle Bra in Buff + White
Sieve Triangle Bra in Buff + White
Sieve Triangle Bra in Buff + White
Sieve Triangle Bra in Buff + White$70+
Sieve Cutout Bra in Buff + WhiteSieve Cutout Bra in Buff + White (alternate view)
Sieve Cutout Bra in Buff + White
Sieve Cutout Bra in Buff + White
Sieve Cutout Bra in Buff + White
Sieve Cutout Bra in Buff + White$70+
Low Stock
Sieve Non-Wire Bra in BlackSieve Non-Wire Bra in Black (alternate view)
Sieve Non-Wire Bra in Black
Sieve Non-Wire Bra in Black
Sieve Non-Wire Bra in Black
Sieve Non-Wire Bra in Black$70+
Sieve Longline Bra in BabeSieve Longline Bra in Babe (alternate view)
Sieve Longline Bra in Babe
Sieve Longline Bra in Babe
Sieve Longline Bra in Babe
Sieve Longline Bra in Babe$70
Sieve Cutout Bra in Bronze SparkSieve Cutout Bra in Bronze Spark (alternate view)
Sieve Cutout Bra in Bronze Spark
Sieve Cutout Bra in Bronze Spark
Sieve Cutout Bra in Bronze Spark
Sieve Cutout Bra in Bronze Spark$70+
Sieve Non-Wire Bra in WhiteSieve Non-Wire Bra in White (alternate view)
Sieve Non-Wire Bra in White
Sieve Non-Wire Bra in White
Sieve Non-Wire Bra in White
Sieve Non-Wire Bra in White$70+
Sieve Cutout Bra in NavySieve Cutout Bra in Navy (alternate view)
Sieve Cutout Bra in Navy
Sieve Cutout Bra in Navy
Sieve Cutout Bra in Navy
Sieve Cutout Bra in Navy$70+
Sieve Cutout Bra in GraphiteSieve Cutout Bra in Graphite (alternate view)
Sieve Cutout Bra in Graphite
Sieve Cutout Bra in Graphite
Sieve Cutout Bra in Graphite
Sieve Cutout Bra in Graphite$70+
Sieve Triangle Bra in SlateSieve Triangle Bra in Slate (alternate view)
Sieve Triangle Bra in Slate
Sieve Triangle Bra in Slate
Sieve Triangle Bra in Slate
Sieve Triangle Bra in Slate$70+
Sieve Non-Wire Bra in SlateSieve Non-Wire Bra in Slate (alternate view)
Sieve Non-Wire Bra in Slate
Sieve Non-Wire Bra in Slate
Sieve Non-Wire Bra in Slate
Sieve Non-Wire Bra in Slate$70+
Sieve Non-Wire Bra in NavySieve Non-Wire Bra in Navy (alternate view)
Sieve Non-Wire Bra in Navy
Sieve Non-Wire Bra in Navy
Sieve Non-Wire Bra in Navy
Sieve Non-Wire Bra in Navy$70+
Sieve Bra Top in BuffSieve Bra Top in Buff (alternate view)
Sieve Bra Top in Buff
Sieve Bra Top in Buff
Sieve Bra Top in Buff
Sieve Bra Top in Buff$65+
Sieve Cutout Bra in PeachSieve Cutout Bra in Peach (alternate view)
Sieve Cutout Bra in Peach
Sieve Cutout Bra in Peach
Sieve Cutout Bra in Peach
Sieve Cutout Bra in Peach$70+
Sieve Non-Wire Bra in GraphiteSieve Non-Wire Bra in Graphite (alternate view)
Sieve Non-Wire Bra in Graphite
Sieve Non-Wire Bra in Graphite
Sieve Non-Wire Bra in Graphite
Sieve Non-Wire Bra in Graphite$70+
Sieve Bra Top in BlackSieve Bra Top in Black (alternate view)
Sieve Bra Top in Black
Sieve Bra Top in Black
Sieve Bra Top in Black
Sieve Bra Top in Black$65+
Available in 3 colors
Sieve Triangle Bra in BlackSieve Triangle Bra in Black (alternate view)
Sieve Triangle Bra in Black
Sieve Triangle Bra in Black
Sieve Triangle Bra in Black

Sieve String 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 Triangle Bra in Black$70+
Available in 5 colors
Sieve Cutout Bra in CobaltSieve Cutout Bra in Cobalt (alternate view)
Sieve Cutout Bra in Cobalt
Sieve Cutout Bra in Cobalt
Sieve Cutout Bra in Cobalt

Sieve Non-Wire Bra in Sea

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.

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

Sieve Cutout Bra in Cobalt$70+
Available in 10 colors
Sieve Bra Top in GarnetSieve Bra Top in Garnet (alternate view)
Sieve Bra Top in Garnet
Sieve Bra Top in Garnet
Sieve Bra Top in Garnet

Sieve Bra Top in Garnet

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.

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

Sieve Bra Top in Garnet$65+
Available in 3 colors
Sieve Non-Wire Bra in GarnetSieve Non-Wire Bra in Garnet (alternate view)
Sieve Non-Wire Bra in Garnet
Sieve Non-Wire Bra in Garnet
Sieve Non-Wire Bra in Garnet

Sieve Non-Wire Bra in Garnet

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.

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

Sieve Non-Wire Bra in Garnet$70+
Available in 10 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.

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