Buy more, save money
Thumbnail image #1 of Sieve Triangle Bra Custom 2-Pack
Thumbnail image #2 of Sieve Triangle Bra Custom 2-Pack
Thumbnail image #3 of Sieve Triangle Bra Custom 2-Pack
Thumbnail image #4 of Sieve Triangle Bra Custom 2-Pack
Thumbnail image #5 of Sieve Triangle Bra Custom 2-Pack
Thumbnail image #6 of Sieve Triangle Bra Custom 2-Pack
Thumbnail image #7 of Sieve Triangle Bra Custom 2-Pack
Thumbnail image #8 of Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack

Sieve Triangle Bra Custom 2-Pack in

Sieve Triangle Bra Custom 2-Pack

4.5
Rated 4.5 out of 5 stars
2,472 Reviews

Surprising support. Deep v neckline.

Our signature Sieve mesh in a lower coverage triangle cut. Great shape - no pad or wire included.
0 1 2 3 4 5
0 1 2 3 4 5
0 1 2 3 4 5
0 1 2 3 4 5
0 1 2 3 4 5
0 1 2 3 4 5
0 1 2 3 4 5
0 1 2 3 4 5
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Sieve Triangle Bra Custom 2-Pack
Zip Code
Save
Invalid zip code

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 caramel-y sunrise desert sands affogato tone
  • 74% Polyamide (Nylon) 26% Elastane (Spandex)
  • Wireless
  • Hand wash in cold water, dry flat

FAQ

  • Price-slashed items are either exchange only or final sale. Any item marked as "exchange only" are eligible for direct size exchange only (aka no refunds). Items marked as "final sale" are not eligible for returns or exchanges.
  • All full-priced, unworn items, with tags attached and in their original packaging are eligible for return or exchange within 60 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
View full details
4.5
Rated 4.5 out of 5 stars
Based on 2,472 reviews
2,472 reviews
  • Kate
    Verified Buyer
    Size Purchased 2
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 36A
    11 minutes ago
    Size Purchased 2
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 36A
    Sieve Triangle Bra in Buff + White
    Reviewing
    Sieve Triangle Bra in Buff + White
    Rated 5 out of 5 stars
    Effortlessly beautiful and functional

    My daily staple. I am 5’6” 133# 36A-B. I wear a 2. The wide band though snug initially ultimately forms comfortably to your body so that you forget you’re wearing a bra until it’s time to take it off. Form and function at its finest.

  • Adrienne T.
    Verified Buyer
    Size Purchased 0
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 32B
    3 days ago
    Size Purchased 0
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 32B
    Sieve Triangle Bra in Cherry
    Reviewing
    Sieve Triangle Bra in Cherry
    Rated 5 out of 5 stars
    Supportive and comfy

    The triangle style of sieve bra is my favorite one - the fit is perfect and it has just enough support.

  • Genevieve B.
    Verified Buyer
    Size Purchased 0
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 32B
    3 days ago
    Size Purchased 0
    How it Fits True to Size
    Age Range 45 - 54
    Bra Size 32B
    Sieve Triangle Bra in Buff + Black
    Reviewing
    Sieve Triangle Bra in Buff + Black
    Rated 3 out of 5 stars
    Sexy!

    Had to return a 0 for a 1

  • Billy B.
    Verified Buyer
    Size Purchased M
    How it Fits A Little Small
    Age Range 35 - 44
    Bra Size 34B
    3 days ago
    Size Purchased M
    How it Fits A Little Small
    Age Range 35 - 44
    Bra Size 34B
    Sieve Triangle Bra in Cherry
    Reviewing
    Sieve Triangle Bra in Cherry
    Rated 5 out of 5 stars
    Absolutely Love

    Amazing products! Highly recommend

  • sarah C.
    Verified Buyer
    Size Purchased 4
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 32DD/E
    4 days ago
    Size Purchased 4
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 32DD/E
    Sieve Triangle Bra in Buff + White
    Reviewing
    Sieve Triangle Bra in Buff + White
    Rated 4 out of 5 stars
    Almost perfect.

    I’m absolutely keeping them, but the Sieve bras aren’t perfect for my slightly saggy post-breastfeeding breasts. Most of my DD volume is lower, so with this style bra there is some gap in the upper portion of the triangle bra. It’s noticeable without a shirt on (obviously!) but only noticeable under clothes *if* the top is clingy above mid-breast (which isn’t many of my tops).

    They are so comfortable and if I bend and fluff a few times a day they fill out more. I’ll keep an eye out for a perfect bra that doesn’t have padding and doesn’t have space… but these will keep me happy enough until that unicorn emerges.

Reviews LoadedReviews Added
Detail view of Sieve Triangle Bra Custom 2-Pack for sizer