
![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 #4 of Sieve Non-Wire Bra in Black [Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_02_154x154.jpg?v=1697147784)

![Thumbnail image #6 of Sieve Non-Wire Bra in Black [Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_02_154x154.jpg?v=1697147781)
![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=1697147781)
![Thumbnail image #8 of Sieve Non-Wire Bra in Black [Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_03_154x154.jpg?v=1697147781)


![[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)
![[Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_02_thumb.jpg?v=1697147784)

![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_02_thumb.jpg?v=1697147781)
![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_01_thumb.jpg?v=1697147781)
![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_03_thumb.jpg?v=1697147781)

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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Free US shipping on all orders from now through 12/31.
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
- Hand wash in cold water, dry flat
FAQ
- All items purchased with the 15% discount during the Holiday Sale have no restrictions and are eligible for all return/exchange outcomes.
- Price-slashed, Last Chance Sale items with a red SALE tag are direct size exchange only (no refunds).
- All full-priced, unworn items, with tags attached and in their original packaging are eligible for return or exchange within 60 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)

![[Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_04.jpg?v=1697147784&width=1445)
![[Ksenia 1]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNW_Black_Ksenia_02.jpg?v=1697147784&width=1445)

![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_02.jpg?v=1697147781&width=1445)
![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_01.jpg?v=1697147781&width=1445)
![[Vitoria 3+]](http://negativeunderwear.com/cdn/shop/products/Bra_SieveNonWirePlus_Black_Vitoria_03.jpg?v=1697147781&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

- Melonie H.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 34DD/E4 minutes agoSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 34DD/EReviewingSieve Non-Wire Bra in BuffRated 5 out of 5 starsA new customer
Currently my favorite. Lightweight, comfortable, and flattering. Love it.
Was this helpful? - Suzette S.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 34C3 days agoSize Purchased 3How it Fits True to SizeAge Range 45 - 54Bra Size 34CReviewingSieve Non-Wire Bra in Buff + BlackRated 4 out of 5 starsLovely bra
I really liked this bra although found that it rode down towards my nipples in the front unless the shoulder straps were pretty tight.
Was this helpful? - Margarita N.Verified BuyerSize Purchased 3How it Fits A Little SmallAge Range 35 - 44Bra Size 36B4 days agoSize Purchased 3How it Fits A Little SmallAge Range 35 - 44Bra Size 36BReviewingSieve Non-Wire Bra in BuffRated 4 out of 5 starsLet my breasts breathe
I think I have 5 bras already. Needed to get new ones after 2 years - old ones are getting a bit stiff. Like that I don’t feel constricted and squeezed (especially in summer) and I hate underwire. I wish that the width of the all around the body strap allowed for a wider bodies. Mine is a bit tight. I’m 36” and between B and C and ordering size 3. Size 4 is too big in the breasts but not as tight around the body.
Was this helpful? - Stephanie L.Verified BuyerSize Purchased 3How it Fits True to SizeAge Range 35 - 44Bra Size 36C4 days agoSize Purchased 3How it Fits True to SizeAge Range 35 - 44Bra Size 36CReviewingSieve Non-Wire Bra in Buff + BlackRated 5 out of 5 starsSexy and comfortable
I love this bra. It's both comfortable and sexy which isn't often the case with bras.
Was this helpful? - Daniel B.Verified BuyerSize Purchased 3How it Fits A Little SmallAge Range 45 - 54Bra Size 36A5 days agoSize Purchased 3How it Fits A Little SmallAge Range 45 - 54Bra Size 36AReviewingSieve Non-Wire Bra in GraphiteRated 5 out of 5 starsComfort
Great bra
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