Sieve Racerback Bra in Spark
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.
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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
- Spark is an iridescent subtle rainbow foil on black mesh base
- 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
- 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 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
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
- Katherine4 minutes agoReviewingSieve Racerback Bra in BuffRated 5 out of 5 stars5 Stars
This bra is the BEST BRA I’ve ever worn. For reference, I’m a 34E/130lb/71 year old. If anyone needs support, it’s me! The designers created a bra beyond expectations: the fabric is light weight, breath thru, with exceptional support, comfort all while delivering great lines and makes me feel pretty. I think magic was involved!
Was this helpful? - Penelope Y.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 35 - 44Bra Size 34B22 hours agoSize Purchased 3How it Fits True to SizeAge Range 35 - 44Bra Size 34BReviewingSieve Racerback Bra in BuffRated 5 out of 5 starsGorgeous, supportive, sexy and luxe
This is the most fashionable-yet-supportive bralette I have ever worn. I bought it in buff and black and am going to stock up on other colors, too, because it is FABULOUS.
Was this helpful? - Marcella K.Verified BuyerSize Purchased 4How it Fits True to SizeAge Range 55 - 64Bra Size 38C3 days agoSize Purchased 4How it Fits True to SizeAge Range 55 - 64Bra Size 38CReviewingSieve Racerback Bra in BlackRated 5 out of 5 starsRace to purchase this Sieve Bra
This racerback bra is somehow strong enough to offer support, yet delicate and sleek enough to make me feel sexy. Which says a lot for a post-50, post menopausal woman who wants to feel like I still deserve to feel sexy once in a while.
This bra is my 5th Negative Sieve Bra purchase. They have been life changing. For decades I lived in an uncomfortable pushed-up, underwire world. Negative bras have made me accept gravity and like what I see. I'm an unofficial brand ambassador now and I won't be shopping anywhere else!
Was this helpful? - JOYCELYN M.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 25 - 34Bra Size Other3 days agoSize Purchased 3How it Fits True to SizeAge Range 25 - 34Bra Size OtherReviewingSieve Racerback Bra in OrchidRated 5 out of 5 starsThe best
Loved it!
Was this helpful? - David E.Verified BuyerSize Purchased XSHow it Fits True to SizeAge Range 45 - 54Bra Size 32A5 days agoSize Purchased XSHow it Fits True to SizeAge Range 45 - 54Bra Size 32AReviewingSieve Racerback Bra in CoralRated 5 out of 5 starsPerfect bra
Great material. Great fit. Love the front clasp
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