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![Thumbnail image #3 of Sieve Brief in White Boa [Ksenia XS]](http://negativeunderwear.com/cdn/shop/products/Bottom_SieveBrief_WhiteBoa_Ksenia_01_154x154.jpg?v=1666745500)
![[Ksenia XS]](http://negativeunderwear.com/cdn/shop/products/Bottom_SieveBrief_WhiteBoa_Ksenia_02_thumb.jpg?v=1666745500)
![[Ksenia XS]](http://negativeunderwear.com/cdn/shop/products/Bottom_SieveBrief_WhiteBoa_Ksenia_03_thumb.jpg?v=1666745500)
![[Ksenia XS]](http://negativeunderwear.com/cdn/shop/products/Bottom_SieveBrief_WhiteBoa_Ksenia_01_thumb.jpg?v=1666745500)
Sieve Brief in White Boa
Sieve Brief
4.5
Rated 4.5 out of 5 stars
399 Reviews
Ultra low rise. Honeycomb micromesh.
Sieve fan? Meet your matching bottom and feel all sorts of pulled together. Create a custom 2 Pack ->
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Free US shipping on all orders from now through 12/31.
Fit
- Size Chart
- Use this as a guide. If you prefer a looser fit, we recommend sizing up
Fabric + Care
- Belgian power micromesh is subtly sheer
- Tonal medium/pale grey snakeskin print on white base
- 74% Polyamide (Nylon) 26% Elastane (Spandex)
- 100% Cotton gusset lining
- Wash on delicates/cold, tumble dry low
FAQ
- 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 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 XS]](http://negativeunderwear.com/cdn/shop/products/Bottom_SieveBrief_WhiteBoa_Ksenia_02.jpg?v=1666745500&width=1445)
![[Ksenia XS]](http://negativeunderwear.com/cdn/shop/products/Bottom_SieveBrief_WhiteBoa_Ksenia_03.jpg?v=1666745500&width=1445)
![[Ksenia XS]](http://negativeunderwear.com/cdn/shop/products/Bottom_SieveBrief_WhiteBoa_Ksenia_01.jpg?v=1666745500&width=1445)

Underwear Sizing
Dress size: | 0-2 | 2-4 | 6-8 | 10-12 | 12-14 | 16-18 |
---|---|---|---|---|---|---|
Your full hip: | 34.5-36" | 36.5-38" | 38.5-40.5" | 41-42.5" | 43-44.5" | 45-46.5" |
Negative size: | XS | S | M | L | XL | XXL |
Q’s about sizing or fit? Email us at hello@negativeunderwear.com

4.5
Rated 4.5 out of 5 stars
Based on 399 reviews
399 reviews
- Lydia F.Verified BuyerSize Purchased MHow it Fits True to SizeAge 35 - 44Jean Size 293 minutes agoSize Purchased MHow it Fits True to SizeAge 35 - 44Jean Size 29ReviewingSieve Brief in BlackRated 5 out of 5 starsLove these undies !
LOVE
Was this helpful? - kristen m.Verified BuyerSize Purchased MHow it Fits A Little BigAge 35 - 44Jean Size 292 weeks agoSize Purchased MHow it Fits A Little BigAge 35 - 44Jean Size 29ReviewingSieve Brief in BlackRated 4 out of 5 starsSieve black
Cute. Not sure if I should have size down somewhat big on coverage/hight up but not much tush coverage
Was this helpful? - kristen m.Verified BuyerSize Purchased MHow it Fits A Little BigAge 35 - 44Jean Size 292 weeks agoSize Purchased MHow it Fits A Little BigAge 35 - 44Jean Size 29ReviewingSieve Brief in SlateRated 4 out of 5 starsSieve slate
Cute. Imo a little big as far as how hight up the brief go but not much rush coverage.
Was this helpful? - Tara C.Verified BuyerSize Purchased XLHow it Fits A Little SmallAge 45 - 54Jean Size 123 weeks agoSize Purchased XLHow it Fits A Little SmallAge 45 - 54Jean Size 12ReviewingSieve Brief in SlateRated 5 out of 5 starsComfy
Comfy
Was this helpful? - Kasey C.Verified BuyerSize Purchased XLHow it Fits True to SizeAge 35 - 44Jean Size 123 weeks agoSize Purchased XLHow it Fits True to SizeAge 35 - 44Jean Size 12ReviewingSieve Brief in BlackRated 5 out of 5 starscomfortable
10/10 would buy again.
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