![Thumbnail image #1 of Sieve Non-Wire Bra in Black [Ksenia 1]](http://negativeunderwear.com/cdn/shop/files/PDP-SieveNonWire-Black_154x154.jpg?v=1697147784)
![Thumbnail image #2 of Sieve Non-Wire Bra in Black [Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_04_154x154.jpg?v=1697147784)
![Thumbnail image #3 of Sieve Non-Wire Bra in Black [Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_01_154x154.jpg?v=1697147784)

![Thumbnail image #5 of Sieve Non-Wire Bra in Black [Vitoria 3+]](http://negativeunderwear.com/cdn/shop/files/SieveNon-WirePlus_Vitoria_NoNip_154x154.png?v=1704468855)
![Thumbnail image #6 of Sieve Non-Wire Bra in Black [Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_03_154x154.jpg?v=1704468855)
![Thumbnail image #7 of Sieve Non-Wire Bra in Black [Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_01_154x154.jpg?v=1704468855)

![retouched image [Ksenia 1]](http://negativeunderwear.com/cdn/shop/files/PDP-SieveNonWire-Black_thumb.jpg?v=1697147784)
![[Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_04_thumb.jpg?v=1697147784)
![[Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_01_thumb.jpg?v=1697147784)

![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/files/SieveNon-WirePlus_Vitoria_NoNip_thumb.png?v=1704468855)
![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_03_thumb.jpg?v=1704468855)
![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_01_thumb.jpg?v=1704468855)

Sieve Non-Wire Bra in Black
Sieve Non-Wire Bra
Our best selling bra for a reason.
The most supportive of our wireless bras. Great shape, naturally smoothing, airy light and sexy sheer — Belgian micromesh might just be magic. Create a custom 2 Pack ->
Buy more, save $
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Description
Our best selling bra for a reason.
The most supportive of our wireless bras. Great shape, naturally smoothing, airy light and sexy sheer — Belgian micromesh might just be magic.
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.
Fabric + Care
- Made from a sheer Belgian power micromesh — nipples are visible
- 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
- 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
![[Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_01.jpg?v=1697147784&width=1445)
![retouched image [Ksenia 1]](http://negativeunderwear.com/cdn/shop/files/PDP-SieveNonWire-Black.jpg?v=1697147784&width=1445)
![[Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_04.jpg?v=1697147784&width=1445)

![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/files/SieveNon-WirePlus_Vitoria_NoNip.png?v=1704468855&width=1445)
![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_03.jpg?v=1704468855&width=1445)
![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_01.jpg?v=1704468855&width=1445)


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
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- Jennifer L.Verified BuyerSize Purchased 2How it Fits True to SizeAge Range 35 - 44Bra Size 34C21 minutes agoSize Purchased 2How it Fits True to SizeAge Range 35 - 44Bra Size 34CReviewingSieve Non-Wire Bra in BuffRated 5 out of 5 starsDemure and comfortable
This bra is beautiful and well-made. I am a 34C and ordered a 2, and it fit perfectly.
Was this helpful? - Cheryl18 hours agoReviewingSieve Non-Wire Bra in Buff + BlackRated 5 out of 5 stars5 Stars
Love!!! Best bra I’ve ever owned.
Was this helpful? - Jeannine R.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 65+Bra Size 34DD/E23 hours agoSize Purchased 3How it Fits True to SizeAge Range 65+Bra Size 34DD/EReviewingSieve Non-Wire Bra in WhiteRated 5 out of 5 starsSuch a great bra
I’m in love with Negative bras. I feel so sexy wearing them and my husband appreciates them too. The bras are comfortable although they are sheer so I have to be careful of “headlights”.
Was this helpful? - Jennifer B.Verified BuyerSize Purchased 1How it Fits True to SizeAge Range 45 - 54Bra Size 34BYesterdaySize Purchased 1How it Fits True to SizeAge Range 45 - 54Bra Size 34BReviewingSieve Non-Wire Bra in BabeRated 5 out of 5 starsI wish I would’ve discovered these bras sooner!!!!
I’m so in love with my new bras!!!!!! I really wish I would’ve discovered them sooner!!!! They provide great support with no bulkiness. Love them!!!!!
Was this helpful? - Sarah S.Verified BuyerSize Purchased 1+How it Fits True to SizeAge Range 35 - 44Bra Size 32DDD/F2 days agoSize Purchased 1+How it Fits True to SizeAge Range 35 - 44Bra Size 32DDD/FReviewingSieve Non-Wire Bra in BlackRated 5 out of 5 starsFinally a great fit!!
I’m 5’8”, 145 lbs 32G naturally (and post 2 kids) and this bra was actually amazingly supportive!! I followed the size chart and got a 1+ and it’s a perfect fit. It’s lighter support so I wouldn’t workout in it, but it’s enough to run errands, wear around the house, extremely comfortable. Fantastic lift. I will add over time the girls gravitate towards the middle, but I think that’s inevitable. Amazing!
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