












Sieve Triangle Bra in Glacier
Sieve Triangle Bra
Surprising support. Deep v neckline.
Our signature Sieve mesh in a lower coverage triangle cut. Great shape - no pad or wire included. Create a custom 2 Pack ->
Buy more, save $
Couldn't load pickup availability
Description
Surprising support. Deep v neckline.
Our signature Sieve mesh in a lower coverage triangle cut. Great shape - no pad or wire included.
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
- Made from a sheer Belgian power micromesh — nipples are visible
- Glacier is an icy winter sky misty ocean cotton candy blue tone
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- Wireless
- Certified Safe: OEKO-TEX® STANDARD 100 #23.HCN.86212 by Hohenstein HTTI
- 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.
- 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.
- 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
Complete the set >


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.
Q’s about sizing or fit? Email us at hello@negativeunderwear.com
Couldn't load pickup availability

- Emilien R.Verified BuyerSize Purchased 2How it Fits A Little BigAge Range 35 - 44Bra Size 34C11 minutes agoSize Purchased 2How it Fits A Little BigAge Range 35 - 44Bra Size 34CReviewingSieve Triangle Bra in BuffRated 5 out of 5 starsSo comfy I fell asleep in it
My first time buying anything from negative and I’m extremely impressed - the brand lives up to the hype! Wonder if I should’ve sized down in this though because it gapes a teeny bit at the sides. But as long as I wear it on the first hook it fits perfectly. For reference I’m 5’6, 117lbs and wear 32 or 34C.
Was this helpful? - smVerified BuyerSize Purchased 2How it Fits True to SizeAge Range 25 - 34Bra Size 34DD/EYesterdaySize Purchased 2How it Fits True to SizeAge Range 25 - 34Bra Size 34DD/EReviewingSieve Triangle Bra in BlackRated 5 out of 5 starsFavorite bra of all time
Please please please make this in every possible color way. There are not enough color options. NEED this in white but would also love it in chocolate brown.
Was this helpful? - Kelli H.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 32DDD/F3 days agoSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 32DDD/FReviewingSieve Triangle Bra in SlateRated 5 out of 5 starsExcellent
Great fit Sexy
Was this helpful? - Monica A.Verified BuyerSize Purchased 5How it Fits True to SizeAge Range 45 - 54Bra Size 38D4 days agoSize Purchased 5How it Fits True to SizeAge Range 45 - 54Bra Size 38DReviewingSieve Triangle Bra in BlackRated 5 out of 5 starsLove it.
This bra fits so perfectly.
Was this helpful? - EllieSize Purchased 1How it Fits True to SizeAge Range 25 - 34Bra Size 30DD/E4 days agoSize Purchased 1How it Fits True to SizeAge Range 25 - 34Bra Size 30DD/EReviewingSieve Triangle Bra in BuffRated 3 out of 5 starsCould use better sizing
I wanted a bra with no underwire and an adjustable strap. I have a small band size compared to my cup size, I’m a 30 DD. Even though this is a bralette style I wish the sizes were closer to regular bra sizes. Or that they at least had more than one cup size for each band size so I don’t have to compromise on having the cups too small or the band too big. The band is also not a very comfortable fabric.
Was this helpful?