












Sieve Racerback Bra in Black
Sieve Racerback Bra
Minimal visibility. Surprising support.
Our most-requested style. A refined T-back, front closure, wireless bra, in our best-selling Sieve power mesh.
Buy more, save $
Couldn't load pickup availability
Description
Minimal visibility. Surprising support.
Our most-requested style. A refined T-back, front closure, wireless bra, in our best-selling Sieve power mesh.
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.
- Single T-strap back for minimal visibility under racerback or cutaway tops
- Plunging deep-V front neckline with front click closure
- Metallic front closure clicks closed so you know you're secure
- Adjustable shoulder straps and a narrow, stretch-fit bottom band
Fabric + Care
- Made from a sheer Belgian power micromesh — nipples are visible
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- Certified Safe: OEKO-TEX® STANDARD 100 #23.HCN.86212 by Hohenstein HTTI
- Wireless
- Discreet metal front click closure and strap adjustment details
- Machine wash warm, hang dry, wear often
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


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

- Jessica G.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 32DD/E44 minutes agoSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 32DD/EReviewingSieve Racerback Bra in BlackRated 3 out of 5 starsI like it but would the same style with padding or additional support.
I do like the racerback but would love for you to make it in less see-through material.
Was this helpful? - Gillian V.Verified BuyerSize Purchased 4How it Fits True to SizeAge Range 35 - 44Bra Size 34D1 hour agoSize Purchased 4How it Fits True to SizeAge Range 35 - 44Bra Size 34DReviewingSieve Racerback Bra in BuffRated 5 out of 5 starsRecommend
Great fit, comfortable and supportive. I’m a 34D/DD and got a size 4. I never u sweat and why bras are so expensive and wish they were cheaper but will be buying more because I like the fit and feel. It would be great to be able to mix and match styles for the buy 2 discount.
Was this helpful? - Sharon L.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 35 - 44Bra Size 34DD/EYesterdaySize Purchased 3How it Fits True to SizeAge Range 35 - 44Bra Size 34DD/EReviewingSieve Racerback Bra in SeaRated 5 out of 5 starsBeautiful
Absolutely beautiful and fits perfectly!
Was this helpful? - Britt G.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 35 - 44Bra Size 38BYesterdaySize Purchased 3How it Fits True to SizeAge Range 35 - 44Bra Size 38BReviewingSieve Racerback Bra in BuffRated 5 out of 5 starsPerfect Racerback I have found!
Finally a racerback bra that it's digging into me. I have always found it so hard to find a good one. This is it!
5'6" / 152lbs - ordered a size 3
Was this helpful? - Mary C.Verified BuyerSize Purchased 2How it Fits A Little SmallAge Range 35 - 44Bra Size 36B2 days agoSize Purchased 2How it Fits A Little SmallAge Range 35 - 44Bra Size 36BReviewingSieve Racerback Bra in BuffRated 5 out of 5 starsLove this!
So hard to find a racerback that is also cute. This fits great.
Was this helpful?