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Slate is a cool grey-blue [Aube 1]
Shown here with our matching Sieve Thong in Slate [Aube 1]
Sieve Triangle Bra in Slate
Hook & eye closure in the back [Aube 1]
[Adelina 1]
[Adelina 1]
Belgian micromesh is sheer and strong
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Product photo #1 of Sieve Triangle Bra in Slate [Aube 1] Product photo #2 of Sieve Triangle Bra in Slate [Aube 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 [Adelina 1] Product photo #6 of Sieve Triangle Bra in Slate [Adelina 1] Product photo #7 of Sieve Triangle Bra in Slate

Sieve Triangle Bra

Rated 4.4 out of 5
Based on 1107 reviews

Surprising support. Deep v neckline.


Our signature Sieve mesh in a lower coverage triangle cut. Great shape - no pad or wire included.
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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

Pair it 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
Silky Non-Wire Bra in Slate Silky Non-Wire Bra in Slate (alternate view) Silky Non-Wire Bra in Slate $65 +
Write a Review
average rating 4.4 out of 5
Based on 1107 reviews
  • 5 Stars
    785 Reviews
  • 4 Stars
    140 Reviews
  • 3 Stars
    99 Reviews
  • 2 Stars
    49 Reviews
  • 1 Star
    34 Reviews
88% of reviewers would recommend this product to a friend
Overall
Rated 0 on a scale of minus 2 to 2, where minus 2 is Hated it, 0 is Meh and 2 is Loved it
Quality
Rated 4 out of 5
Comfort
Rated 4 out of 5
1107 Reviews
Reviewed by Sara
Verified Buyer
Review posted
Sieve Triangle Bra in Coral
Reviewing
Sieve Triangle Bra in Coral
I don't recommend this product
Rated 1 out of 5
Size Purchased
1
How it Fits
True to Size
Age Range
25 - 34
Bra Size
32B

Strap broke first time wearing it.

The strap on this bra broke the first time I put it on. I have several of these bras because they are so comfortable, but I guess I will need to keep safety pins in my purse in case they break!

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Overall
Rated 0 on a scale of minus 2 to 2, where minus 2 is Hated it, 0 is Meh and 2 is Loved it
Quality
Rated 1 out of 5
Comfort
Rated 4 out of 5
Was this helpful?
Reviewed by Annette A.
Verified Buyer
Review posted
Sieve Triangle Bra in Buff + Black
Reviewing
Sieve Triangle Bra in Buff + Black
Rated 3 out of 5
Size Purchased
3
How it Fits
A Little Small
Age Range
55 - 64
Bra Size
36C

😐

Same as the thong - what’s with the stuff elastic. Also it pushed up fat in areas I didn’t know I had like underarms.

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Overall
Rated -1 on a scale of minus 2 to 2, where minus 2 is Hated it, 0 is Meh and 2 is Loved it
Quality
Rated 3 out of 5
Comfort
Rated 2 out of 5
Was this helpful?
Reviewed by Ashley W.
Verified Buyer
Review posted
Sieve Triangle Bra in Black
Reviewing
Sieve Triangle Bra in Black
I recommend this product
Rated 5 out of 5
Size Purchased
4
How it Fits
A Little Small
Age Range
45 - 54
Bra Size
36D

Great!

Great bra. Usually a size 36D , guide recommended size 3 didn’t fit well. Exchange was easy and fast. Size 4 is perfect!

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Overall
Rated 2 on a scale of minus 2 to 2, where minus 2 is Hated it, 0 is Meh and 2 is Loved it
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Was this helpful?

Non-Wire Bra Sizing

Non-Wire Bra Sizing Size Chart

* Non-wire bra sizing can vary by preference and if you're toward the top of a size range and prefer more coverage, you may want to size up. For styles available in + sizes (designed with additional support details for our larger cup customers), we find DD's can be on the cusp - if you prefer more coverage and support, we suggest the + bra equivalent for your band size.

Btw, the size nomenclature has changed for Bra Tops. Here's the conversion:
XS=0, S=1, M=2, L=3, XL=4, XXL=5

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

@negativeunderwear