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Buff and Black trim is fashionable yet subtle
Triangle cut is low coverage at the front and sides
Shown here with our Sieve High Waist Brief in Buff + Black
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Sieve Triangle Bra

Rated 4.5 out of 5
Based on 282 reviews

Surprising support. Deep v neckline.

Our signature Sieve mesh in a lower coverage triangle cut.
 

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Free shipping over $100. Easy Returns.

Fit

  • Size Chart
  • Use this as a guide. Preference is a huge factor — the benefit of a non-wire is they're super flexible, so you will likely fit in more than one size. Like a looser band? Size up! Like less coverage? Size down! Still unsure? Try two sizes :)
  • Adjustable straps and hook & eye closure in the back
  • *Note, our Sieve Triangle Bra is an intentionally lower coverage in both the cups and the sides. Wide plush elastic band is extremely adaptable.

Fabric + Care

  • Size Chart
  • Made from a sheer Belgian power micromesh — nipples are visible
  • 74% Polyamide (Nylon) 26% Elastane (Spandex)
  • Hand wash in cold water, dry flat

FAQ

  • All unworn items, with tags attached and in their original packaging are eligible for return or exchange within 21 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 Thong in Buff + Black Sieve Thong in Buff + Black Sieve Thong in Buff + Black $30 +
Rated 4.7 out of 5
Based on 166 reviews
Sieve High-Waist Brief in Buff + Black Sieve High-Waist Brief in Buff + Black Sieve High-Waist Brief in Buff + Black $45 +
Rated 4.3 out of 5
Based on 18 reviews
Silky Thong in Buff + Black Silky Thong in Buff + Black Silky Thong in Buff + Black $30 +
Rated 4.7 out of 5
Based on 98 reviews
Whipped High Rise in Buff + Black Whipped High Rise in Buff + Black Whipped High Rise in Buff + Black $45 +
Rated 4.7 out of 5
Based on 215 reviews
Write a Review
average rating 4.5 out of 5
Based on 282 reviews
  • 5 Stars
    196 Reviews
  • 4 Stars
    37 Reviews
  • 3 Stars
    37 Reviews
  • 2 Stars
    8 Reviews
  • 1 Star
    4 Reviews
90% of reviewers would recommend this product to a friend
282 Reviews
Reviewed by Amber O.
Verified Buyer
Sieve Triangle Bra in Moon
Reviewing
Sieve Triangle Bra in Moon
I recommend this product
Rated 2 out of 5
Review posted

Not enough support

Loved everything about this bra, however, it didn’t offer enough support. The recommended band size felt a little too loose even on the smallest setting and the cups didn’t quite offer enough coverage for my comfort.

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Reviewed by Isabel G.
Verified Buyer
Sieve Triangle Bra in Slate
Reviewing
Sieve Triangle Bra in Slate
I recommend this product
Rated 5 out of 5
Review posted

So cute!

I love this bra! The blue color is absolutely beautiful. I love the sheer, it makes the bra feel a bit sexier but still incredibly comfortable.

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Reviewed by Valerie
Verified Buyer
Sieve Triangle Bra in Buff + Black
Reviewing
Sieve Triangle Bra in Buff + Black
I recommend this product
Rated 5 out of 5
Review posted

FINALLY

A supportive bra that isn’t overly constructed and without wire!! Love it and super sexy.

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Non-Wire Bra Sizing

Non-Wire Bra Sizing Size Chart

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

@negativeunderwear