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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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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
1,922 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 + WhiteNEWWhite 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
  • A steely grey-blue 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

Looks good with ->

Sieve Non-Wire Bra in Slate Sieve Non-Wire Bra in Slate (alternate view) Sieve Non-Wire Bra in Slate $65 +
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 $75
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 1,922 reviews
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1,922 reviews
  • Cindy L.
    Verified Buyer
    Size Purchased 4
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 38B
    3 hours ago
    Size Purchased 4
    How it Fits True to Size
    Age Range 55 - 64
    Bra Size 38B
    Sieve Triangle Bra in Black
    Reviewing
    Sieve Triangle Bra in Black
    Rated 5 out of 5 stars
    Love my new bras and undies!

    Comfy! Can’t wait to try more styles and items

    Was this helpful?
  • Karen S.
    Verified Buyer
    Size Purchased S
    How it Fits Runs Small
    Age Range 55 - 64
    Bra Size 34B
    16 hours ago
    Size Purchased S
    How it Fits Runs Small
    Age Range 55 - 64
    Bra Size 34B
    Sieve Triangle Bra in Cherry
    Reviewing
    Sieve Triangle Bra in Cherry
    Rated 2 out of 5 stars
    too small!

    Pretty, but, unfortunately, it is small. I contacted them about it and it seemed they encouraged giving it a try I should have returned it.

    Was this helpful?
  • Erica O.
    Verified Buyer
    Size Purchased 2
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 34C
    20 hours ago
    Size Purchased 2
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 34C
    Sieve Triangle Bra in Buff + White
    Reviewing
    Sieve Triangle Bra in Buff + White
    Rated 3 out of 5 stars
    The white was too visible under clothes

    I love the fit and style of the sieve triangle bra, but the white trim was too visible under all my white tanks and t-shirts for summer, so it was returned.

    Was this helpful?
  • Erica O.
    Verified Buyer
    Size Purchased 2
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 34C
    20 hours ago
    Size Purchased 2
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 34C
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    Great fit and look!

    I have worn this bra a couple times now. It is very flattering and I enjoy to wear it. It is comfortable when sitting and being active (walking long distances.) The band does not roll or dig in. The navy color still somewhat disguises the nipples. I am a 34C and a size 2 fits great.

    Was this helpful?
  • Michelle H.
    Verified Buyer
    Size Purchased 2
    How it Fits A Little Small
    Age Range 25 - 34
    Bra Size 36B
    Yesterday
    Size Purchased 2
    How it Fits A Little Small
    Age Range 25 - 34
    Bra Size 36B
    Sieve Triangle Bra in Buff + White
    Reviewing
    Sieve Triangle Bra in Buff + White
    Rated 4 out of 5 stars
    A Subtle Sexy

    This bra is surprisingly supportive and has this super subtle sexy vibe.

    It runs a little small in the band, so I'm exchanging it for a size up. It is super comfortable as is, but is squeezing in the back a little more than I'd like

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

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