











Sieve Racerback Bra in Black
Minimal visibility. Surprising support.
Our most-requested style. A refined T-back, front closure, wireless bra, in our best-selling Sieve power mesh.
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.
- 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
- Size Chart
- Made from a sheer Belgian power micromesh — nipples are visible
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- 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.
- 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
- Heather F.Verified BuyerSize Purchased 2How it Fits A Little SmallAge Range 45 - 54Bra Size 34C3 minutes agoSize Purchased 2How it Fits A Little SmallAge Range 45 - 54Bra Size 34CReviewingSieve Racerback Bra in BlackRated 5 out of 5 starsOrdering another!
Comfortable & going to order in other colors!
Was this helpful? - Richard B.Verified BuyerSize Purchased 2How it Fits True to SizeAge Range 25 - 34Bra Size 34C5 hours agoSize Purchased 2How it Fits True to SizeAge Range 25 - 34Bra Size 34CReviewingSieve Racerback Bra in CoralRated 5 out of 5 starsThe Razorback works
This style bra was so well received and appreciated, as the summer workout season is upon us and will work well under certain workout tops.
Was this helpful? - Suzanne B.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 34D21 hours agoSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 34DReviewingSieve Racerback Bra in CoralRated 5 out of 5 starsRacerback bra
Really comfortable! Doesn’t hurt my neck like some
Was this helpful? - Martha M.Verified BuyerSize Purchased 1How it Fits True to SizeAge Range 45 - 54Bra Size 34AYesterdaySize Purchased 1How it Fits True to SizeAge Range 45 - 54Bra Size 34AReviewingSieve Racerback Bra in CoralRated 4 out of 5 starsGreat fit, didn’t love the color.
Bra itself I loved but the color was more orange than I expected. Had to return.
Was this helpful? - Cheryl E.Verified BuyerSize Purchased 2How it Fits True to SizeAge Range 55 - 64Bra Size 34CYesterdaySize Purchased 2How it Fits True to SizeAge Range 55 - 64Bra Size 34CReviewingSieve Racerback Bra in CoralRated 5 out of 5 starsPerfect bra for sports tops
I love the sheerness of this bra and the no shoe strap! Would love more neutral colors to be in stock!
Was this helpful?
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
