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Our signature power mesh in a deep v neckline bralette [Paula 1]
Slate is a steely grey blue tone [Paula 1]
Belgian micromesh is sheer and strong
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]
  • Thumbnail image #1 of Sieve Triangle Bra in Slate [Paula 1]
  • Thumbnail image #2 of Sieve Triangle Bra in Slate [Paula 1]
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  • Thumbnail image #4 of Sieve Triangle Bra in Slate [Aube 1]
  • Thumbnail image #5 of Sieve Triangle Bra in Slate [Aube 1]
  • Thumbnail image #6 of Sieve Triangle Bra in Slate [Aube 1]
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Product photo #1 of Sieve Triangle Bra in Slate [Paula 1] Product photo #2 of Sieve Triangle Bra in Slate [Paula 1] Product photo #3 of Sieve Triangle Bra in Slate Product photo #4 of Sieve Triangle Bra in Slate [Aube 1] Product photo #5 of Sieve Triangle Bra in Slate [Aube 1] Product photo #6 of Sieve Triangle Bra in Slate [Aube 1]

Sieve Triangle Bra in Slate

Rated 4.5 out of 5
Based on 280 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
  • A caramel-y sunrise desert sands affogato tone
  • 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
average rating 4.5 out of 5
Based on 280 reviews
  • 5 Stars
    195 Reviews
  • 4 Stars
    37 Reviews
  • 3 Stars
    37 Reviews
  • 2 Stars
    7 Reviews
  • 1 Star
    4 Reviews
90% of reviewers would recommend this product to a friend
280 Reviews
Reviewed by Valerie
Verified Buyer
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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Reviewed by PHYLLIS D.
Verified Buyer
I recommend this product
Rated 4 out of 5
Review posted

It does what I want...

...and that is, it lifts my little ladies, without padding or an underwire.

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Reviewed by Nina A.
Verified Buyer
I recommend this product
Rated 4 out of 5
Review posted

Very sexy bra

I am a 36 C 145 pounds, 5’6”. This bra is fits true to size and very nicely. My boobs sit very well in this triangle bra. I love the sheer see-through material. I gave this a four star for two reasons: the band is a little uncomfortable. The material is rough and can cause irritation. The second reason is for the price. I don’t feel the quality of this bra is worth the cost of it. Don’t get me wrong, it’s a greet bra, but maybe in the $30.00-$40.00 range.

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