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Power micromesh is surprisingly supportive [Aube 1]
Triangle cut is low coverage in the front and sides [Aube 1]
Adjustable hook and eye and strap sliders in the back [Aube 1]
Sieve Triangle Bra in Black
Hannah is a 36DD in our size 4 [Hannah 4]
The back of the bra can be adjusted tighter or looser [Hannah 4]
Wide elastic bland is comfortable and supportive
flat
Thumbnail image #1 of Sieve Triangle Bra in Black [Aube 1]
Thumbnail image #2 of Sieve Triangle Bra in Black [Aube 1]
Thumbnail image #3 of Sieve Triangle Bra in Black [Aube 1]
Thumbnail image #4 of Sieve Triangle Bra in Black
Thumbnail image #5 of Sieve Triangle Bra in Black [Hannah 4]
Thumbnail image #6 of Sieve Triangle Bra in Black [Hannah 4]
Thumbnail image #7 of Sieve Triangle Bra in Black
Buy more, save money
Power micromesh is surprisingly supportive [Aube 1]
Triangle cut is low coverage in the front and sides [Aube 1]
Adjustable hook and eye and strap sliders in the back [Aube 1]
Sieve Triangle Bra in Black
Hannah is a 36DD in our size 4 [Hannah 4]
The back of the bra can be adjusted tighter or looser [Hannah 4]
Wide elastic bland is comfortable and supportive

Sieve Triangle Bra

4.5
Rated 4.5 out of 5 stars
2,066 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 ->
BlackBuffSlateBuff + WhitePeachWhiteNavyBuff + BlackCherryCoralCoral + WhiteHazeMoonNEWWhite Boa

Buy more, save $

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
  • 74% Polyamide (Nylon) 26% Elastane (Spandex)
  • Wireless
  • Hand wash in cold water, dry flat

FAQ

  • Price-slashed, Annual Sale items with a red SALE tag are direct size exchange only (no refunds). Full-priced items purchased with the 20% off discount are eligible for refund, credit or exchange. Click here for more info on our Sale policies.
  • 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

Looks good with ->

Sieve Thong in Black Sieve Thong in Black (alternate view) Sieve Thong in Black $32 +
Sieve String Thong in Black Sieve String Thong in Black (alternate view) Sieve String Thong in Black $30
Sieve Brief in Black Sieve Brief in Black (alternate view) Sieve Brief in Black $35 +
Sieve High-Waist Brief in Black Sieve High-Waist Brief in Black (alternate view) Sieve High-Waist Brief in Black $45 +
4.5
Rated 4.5 out of 5 stars
Based on 2,066 reviews
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2,066 reviews
  • Francesca H.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age Range 65+
    Bra Size 36DD/E
    3 minutes ago
    Size Purchased M
    How it Fits True to Size
    Age Range 65+
    Bra Size 36DD/E
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    no title

    Surprising conforrable. I am delighted.

    Was this helpful?
  • Portia W.
    Verified Buyer
    Size Purchased 4
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 38C
    16 hours ago
    Size Purchased 4
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 38C
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    Supportive and pretty

    I’m so used to underwire, but I was pleasantly surprised by support from this bra!

    Was this helpful?
  • Mary R.
    Verified Buyer
    Size Purchased 1
    How it Fits True to Size
    Age Range 65+
    Bra Size 34A
    Yesterday
    Size Purchased 1
    How it Fits True to Size
    Age Range 65+
    Bra Size 34A
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    my new fav

    This is my first purchase of this bra and it will not be the last. I love the simplicity of it in addition to the comfort and fit.

    Was this helpful?
  • Stacey R.
    Verified Buyer
    Size Purchased 2
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 34C
    Yesterday
    Size Purchased 2
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 34C
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    Very pleased

    Love the weightless feel. Very sexy.

    Was this helpful?
  • Tad S.
    Verified Buyer
    Size Purchased 2
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 32C
    Yesterday
    Size Purchased 2
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 32C
    Sieve Triangle Bra in Buff + White
    Reviewing
    Sieve Triangle Bra in Buff + White
    Rated 5 out of 5 stars
    Perfect gift

    Bought them as a surprise for my wife. SHE LOVES THEM!

    Was this helpful?
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Detail view of Sieve Triangle Bra in Black for sizer

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