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Sieve Triangle Bra in Black and in Buff and in Slate (3 Pack)
Sieve Triangle Bra in Black and in Buff and in Slate (3 Pack)
Sieve Triangle Bra in Black and in Buff and in Slate (3 Pack)
Sieve Triangle Bra in Black and in Buff and in Slate (3 Pack)
Sieve Triangle Bra in Black and in Buff and in Slate (3 Pack)
Sieve Triangle Bra in Black and in Buff and in Slate (3 Pack)
Sieve Triangle Bra in Black and in Buff and in Slate (3 Pack)
Sieve Triangle Bra in Black and in Buff and in Slate (3 Pack)
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Sieve Triangle Bra in Black and Buff and Slate (3 Pack)

Rated 4.5 out of 5
Based on 1249 reviews

Our signature mesh in a deep v cut x3


A plunge neckline triangle bralette in our best selling micromesh. A hybrid of support, comfy, sexy, cool — aka winning. 
Sieve Triangle Bra in Black
Sieve Triangle Bra in Buff
Sieve Triangle Bra in Slate

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
  • 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
average rating 4.5 out of 5
Based on 1249 reviews
  • 5 Stars
    896 Reviews
  • 4 Stars
    158 Reviews
  • 3 Stars
    109 Reviews
  • 2 Stars
    50 Reviews
  • 1 Star
    36 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
1249 Reviews
Reviewed by Ethel K.
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5
Size Purchased
5
How it Fits
True to Size
Age Range
25 - 34
Bra Size
40C

Great fit

I love this. I have a broad chest which makes it hard to find bras that fit properly, let alone these types. I’m between a 40C/D. They fit well, they’re COOLING. Like the air flow is great and I don’t feel restricted.

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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?
Reviewed by Morgan W.
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5
Size Purchased
2
How it Fits
True to Size
Age Range
25 - 34
Bra Size
34B

Great bra

Super comfortable sexy bra

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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?
Reviewed by Julianne H.
Verified Buyer
Review posted
I recommend this product
Rated 5 out of 5
Size Purchased
4
How it Fits
True to Size
Age Range
55 - 64
Bra Size
36D

Thank you!!

As a breast cancer survivor I have been unable to find a bra that is comfortable for my post mastectomy breasts. They all irritate my scars and make me miserable. Then I found your company and I am in heaven! The bras are supportive without being binding, look sexy and make me feel like my old self for the first time in two years! Thanks so much for making the most comfortable and beautiful bra ever!

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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?