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Triangle cut is low coverage at the front and sides [Giselle 1]
Moon is a pale silvery grey tone [Giselle 1]
Sieve Triangle Bra in Moon
Adjustable hook & eye and strap sliders in the back [Giselle 1]
A triangle bra and low rise thong in our signature micromesh [Giselle 1]
flat
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Triangle cut is low coverage at the front and sides [Giselle 1] Moon is a pale silvery grey tone [Giselle 1] Sieve Triangle Bra in Moon Adjustable hook & eye and strap sliders in the back [Giselle 1] A triangle bra and low rise thong in our signature micromesh [Giselle 1]

Sieve Triangle Bra

4.5
Rated 4.5 out of 5 stars
1,742 Reviews

Surprising support. Deep v neckline.

Our signature Sieve mesh in a lower coverage triangle cut. Great shape - no pad or wire included. Create a custom 2 Pack ->
NEW

Free U.S. shipping on orders over $100. Easy returns.

Fit

  • Size Chart
  • Use this as a guide. Preference is a huge factor — if you’re near the top of a size range and/or prefer more coverage, you may want to size up.
  • Triangle cut has lower coverage in both the cups and the sides.

Fabric + Care

  • Size Chart
  • Made from a sheer Belgian power micromesh — nipples are visible
  • A soft silvery cloud lunar dust baby bunny ears tone
  • 74% Polyamide (Nylon) 26% Elastane (Spandex)
  • Wireless
  • Hand wash in cold water, dry flat

FAQ

  • All full-priced, unworn items, with tags attached and in their original packaging are eligible for return or exchange within 30 days of placing your order.
  • Please note, packs must be returned in full. We do not accept partial returns of packs.
  • Want to know our full returns policies? Here you go.
  • Want more info about shipping, materials or care instructions? Here!

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

Pair it with ->

Sieve High-Waist Brief in Moon Sieve High-Waist Brief in Moon (alternate view) Sieve High-Waist Brief in Moon $45
Whipped High Rise in Moon Whipped High Rise in Moon (alternate view) Whipped High Rise in Moon $45
Whipped Boy Short in Moon Whipped Boy Short in Moon (alternate view) Whipped Boy Short in Moon $45
Whipped Slip Dress in Moon Whipped Slip Dress in Moon (alternate view) Whipped Slip Dress in Moon $85
4.5
Rated 4.5 out of 5 stars
Based on 1,742 reviews
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1,742 reviews
  • Tamlya E.
    Verified Buyer
    Size Purchased 1
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 34B
    4 minutes ago
    Size Purchased 1
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 34B
    Sieve Triangle Bra in Black
    Reviewing
    Sieve Triangle Bra in Black
    Rated 5 out of 5 stars
    Most comfortable bra ever

    I was about to give up wearing one altogether until I found Negative. This is a supremely comfortable bra with NO WIRES! Much more supportive than any bralette and classy. Very classy.

    Was this helpful?
  • Angie M.
    Verified Buyer
    Size Purchased 3
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 34C
    4 hours ago
    Size Purchased 3
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 34C
    Sieve Triangle Bra in Coral + White
    Reviewing
    Sieve Triangle Bra in Coral + White
    Rated 5 out of 5 stars
    Comfortable

    Loved this new style. Wasn’t sure about the clasp in back as I have gone to not having them but was very comfortable

    Was this helpful?
  • Sarah L.
    Verified Buyer
    Size Purchased 1
    How it Fits True to Size
    Age Range 25 - 34
    Bra Size 32C
    5 days ago
    Size Purchased 1
    How it Fits True to Size
    Age Range 25 - 34
    Bra Size 32C
    Sieve Triangle Bra in Buff
    Reviewing
    Sieve Triangle Bra in Buff
    Rated 5 out of 5 stars
    Great bra

    This is my first time trying Negative bras, and they really live up to the hype! Great quality and very supportive. I decided to go with the glace material instead of the sieve as I am planning to wear this with white shirts and want a bit more coverage around the nip area.

    Was this helpful?
  • Cherry S.
    Verified Buyer
    Size Purchased 3
    How it Fits True to Size
    Age Range 65+
    Bra Size 34DD/E
    5 days ago
    Size Purchased 3
    How it Fits True to Size
    Age Range 65+
    Bra Size 34DD/E
    Sieve Triangle Bra in Cherry
    Reviewing
    Sieve Triangle Bra in Cherry
    Rated 5 out of 5 stars
    LOVE

    So pretty...comfortable...love the style.

    Was this helpful?
  • Sean D.
    Verified Buyer
    Size Purchased 5
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 30DD/E
    5 days ago
    Size Purchased 5
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 30DD/E
    Sieve Triangle Bra in Black
    Reviewing
    Sieve Triangle Bra in Black
    Rated 5 out of 5 stars
    Very comfortable and enjoyable.

    Wife loves it. Wants more!

    Was this helpful?
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Non-Wire Bra Sizing

Non-Wire Bra Sizing Size Chart

* 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

Detail view of Sieve Triangle Bra in Moon for sizer

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