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Slate is a cool grey-blue [Aube 1]
Hook & eye closure in the back [Aube 1]
Shown here with our matching Sieve Thong in Slate [Aube 1]
Sieve Triangle Bra in Slate
[Adelina 1]
[Adelina 1]
Belgian micromesh is sheer and strong
flat
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Thumbnail image #5 of Sieve Triangle Bra in Slate [Adelina 1]
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Thumbnail image #7 of Sieve Triangle Bra in Slate
Buy more, save money
Slate is a cool grey-blue [Aube 1]
Hook & eye closure in the back [Aube 1]
Shown here with our matching Sieve Thong in Slate [Aube 1]
Sieve Triangle Bra in Slate
[Adelina 1]
[Adelina 1]
Belgian micromesh is sheer and strong

Sieve Triangle Bra

4.5
Rated 4.5 out of 5 stars
2,088 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 + WhiteHazeMoonWhite BoaNEWPunch

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
  • A steely grey-blue tone
  • 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 Non-Wire Bra in Slate Sieve Non-Wire Bra in Slate (alternate view) Sieve Non-Wire Bra in Slate $70 +
Sieve Bra Top in Slate Sieve Bra Top in Slate (alternate view) Sieve Bra Top in Slate $65 +
Sieve Demi Bra in Slate Sieve Demi Bra in Slate (alternate view) Sieve Demi Bra in Slate $78
Sale
Silky Non-Wire Bra in Slate Silky Non-Wire Bra in Slate (alternate view) Silky Non-Wire Bra in Slate $38 +
4.5
Rated 4.5 out of 5 stars
Based on 2,088 reviews
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2,088 reviews
  • Sarah S.
    Verified Buyer
    Size Purchased 4
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 36DD/E
    4 minutes ago
    Size Purchased 4
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 36DD/E
    Sieve Triangle Bra in Coral + White
    Reviewing
    Sieve Triangle Bra in Coral + White
    Rated 5 out of 5 stars
    So cute

    The triangle bra is a fun addition to any lingerie wardrobe but the coral + white combination is so cute and sweet. Great quality and comfortable.

    Was this helpful?
  • Laura M.
    Verified Buyer
    Size Purchased 2
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 32C
    1 hour ago
    Size Purchased 2
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 32C
    Sieve Triangle Bra in Buff
    Reviewing
    Sieve Triangle Bra in Buff
    Rated 5 out of 5 stars
    Beautiful and comfortable

    I got this in multiple colors and I love it. It’s comfortable and still super sexy. It’s very see through (obviously) so won’t work under everything but I love the deep V.

    Was this helpful?
  • Megan B.
    Verified Buyer
    Size Purchased 3
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 38B
    Yesterday
    Size Purchased 3
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 38B
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    Great color

    Perfect color

    Was this helpful?
  • Sarah B.
    Verified Buyer
    Size Purchased 3
    How it Fits A Little Small
    Age Range 35 - 44
    Bra Size 36B
    3 days ago
    Size Purchased 3
    How it Fits A Little Small
    Age Range 35 - 44
    Bra Size 36B
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    Great Products

    I ordered this in a #3 I’m

    A 36B to 38C once I exchanged it for a #4 it was a perfect it!!

    Was this helpful?
  • Lauren C.
    Verified Buyer
    Size Purchased 3
    How it Fits Runs Small
    Age Range 45 - 54
    Bra Size 32DDD/F
    4 days ago
    Size Purchased 3
    How it Fits Runs Small
    Age Range 45 - 54
    Bra Size 32DDD/F
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 1 out of 5 stars
    cups have very little coverage

    the cups do not cover the breast area that needs coverage, not even the nipples

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

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