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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
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Buy more, save money
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

4.5
Rated 4.5 out of 5 stars
2,086 Reviews

Surprising support. Deep v neckline.

Our signature Sieve mesh in a lower coverage triangle cut. Great shape - no pad or wire included.
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 in Black
Sieve Triangle Bra in Buff
Sieve Triangle Bra in Slate
Sieve Triangle Bra in Buff + White
Sieve Triangle Bra in Buff + Black
Sieve Triangle Bra in Cherry
Sieve Triangle Bra in Peach
Sieve Triangle Bra in White
Sieve Triangle Bra in Coral
Sieve Triangle Bra in Coral + White
Sieve Triangle Bra in Navy
Sieve Triangle Bra in Haze
Sieve Triangle Bra in Moon
Sieve Triangle Bra in White Boa
Sieve Triangle Bra in Punch

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

FAQ

  • Price-slashed, Annual Sale items with a red SALE tag are direct size exchange only (no refunds). Full-priced items purchased with the 20% off discount are eligible for refund, credit or exchange. Click here for more info on our Sale policies.
  • 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
4.5
Rated 4.5 out of 5 stars
Based on 2,086 reviews
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2,086 reviews
  • Megan B.
    Verified Buyer
    Size Purchased 3
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 38B
    4 minutes ago
    Size Purchased 3
    How it Fits True to Size
    Age Range 35 - 44
    Bra Size 38B
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    Great color

    Perfect color

    Was this helpful?
  • Sarah B.
    Verified Buyer
    Size Purchased 3
    How it Fits A Little Small
    Age Range 35 - 44
    Bra Size 36B
    Yesterday
    Size Purchased 3
    How it Fits A Little Small
    Age Range 35 - 44
    Bra Size 36B
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    Great Products

    I ordered this in a #3 I’m

    A 36B to 38C once I exchanged it for a #4 it was a perfect it!!

    Was this helpful?
  • Lauren C.
    Verified Buyer
    Size Purchased 3
    How it Fits Runs Small
    Age Range 45 - 54
    Bra Size 32DDD/F
    2 days ago
    Size Purchased 3
    How it Fits Runs Small
    Age Range 45 - 54
    Bra Size 32DDD/F
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 1 out of 5 stars
    cups have very little coverage

    the cups do not cover the breast area that needs coverage, not even the nipples

    Was this helpful?
  • Meredith P.
    Verified Buyer
    Size Purchased 3
    How it Fits A Little Big
    Age Range 45 - 54
    Bra Size 36B
    3 days ago
    Size Purchased 3
    How it Fits A Little Big
    Age Range 45 - 54
    Bra Size 36B
    Sieve Triangle Bra in Black
    Reviewing
    Sieve Triangle Bra in Black
    Rated 4 out of 5 stars
    Very comfortable

    It is very comfortable and supportive. Also sexy. I went with the size 3 for more coverage and the cups might be a tad large, but still work for me. Size 34-36 B-C post mastectomy

    Was this helpful?
  • kelli w.
    Verified Buyer
    Size Purchased 4
    How it Fits A Little Small
    Age Range 35 - 44
    Bra Size 36B
    3 days ago
    Size Purchased 4
    How it Fits A Little Small
    Age Range 35 - 44
    Bra Size 36B
    Sieve Triangle Bra in Navy
    Reviewing
    Sieve Triangle Bra in Navy
    Rated 5 out of 5 stars
    Comfort

    My favorite Negative bra. The deep V is functional with all tops and doesn’t compromise support.

    Was this helpful?
Reviews LoadedReviews Added

Non-Wire Bra Sizing

Your underbust: A B C D DD DDD G
24-26" 30 0 0 0 1 1* 1+
26-28" 32 0 0 1 2 2* 1+ 1+
28-30" 34 1 1 2 2 3* 2+ 2+
30-32" 36 1 2 3 3 4* 3+ 3+
32-34" 38 3 3 4 4 5* 4+ 4+
35-38" 40 3 5 5 5 5* 5+ 5+
38-40" 42 5 5 5 5*

* 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

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

@negativeunderwear