Give $20, get $20. Win win.
Free US shipping on orders over $100. Easy returns.
Skip to main content
Your cart
Buy more, save money
Sieve Brief in Slate
Sieve Brief in Slate
Sieve Brief in Slate
Sieve Brief in Slate
flat
Thumbnail image #1 of Sieve Brief in Slate
Thumbnail image #2 of Sieve Brief in Slate
Thumbnail image #3 of Sieve Brief in Slate
Thumbnail image #4 of Sieve Brief in Slate
Buy more, save money
Sieve Brief in Slate
Sieve Brief in Slate
Sieve Brief in Slate
Sieve Brief in Slate

Sieve Brief

4.5
Rated 4.5 out of 5 stars
380 Reviews

Ultra low rise. Honeycomb micromesh.


Sieve fan? Meet your matching bottom and feel all sorts of pulled together. Create a custom 2 Pack ->
BlackBuffNavyPeachSlateNEWBuff BoaCoralHazeWhite Boa

Buy more, save $

Free U.S. shipping on orders over $100. Easy returns.

Fit

  • Size Chart
  • Use this as a guide. If you prefer a looser fit, we recommend sizing up

Fabric + Care

  • Size Chart
  • Belgian power micromesh is subtly sheer
  • Steely blue-grey tone
  • 74% Polyamide (Nylon) 26% Elastane (Spandex)
  • 100% Cotton gusset lining
  • Wash on delicates/cold, tumble dry low

FAQ

  • Price-slashed, Annual Sale items with a red SALE tag are direct size exchange only (no refunds). Full-priced items purchased with the 20% off discount are eligible for refund, credit or exchange. Click here for more info on our Sale policies.
  • 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

Looks good with ->

Sieve Non-Wire Bra in Slate Sieve Non-Wire Bra in Slate (alternate view) Sieve Non-Wire Bra in Slate $70 +
Sieve Triangle Bra in Slate Sieve Triangle Bra in Slate (alternate view) Sieve Triangle Bra in Slate $70 +
Sieve Bra Top in Slate Sieve Bra Top in Slate (alternate view) Sieve Bra Top in Slate $65 +
Sieve Demi Bra in Slate Sieve Demi Bra in Slate (alternate view) Sieve Demi Bra in Slate $78
4.5
Rated 4.5 out of 5 stars
Based on 380 reviews
Write a Review (Opens in a new window)
380 reviews
  • Lisa M.
    Verified Buyer
    Size Purchased XL
    How it Fits A Little Small
    Age 45 - 54
    Jean Size 32, 14
    3 minutes ago
    Size Purchased XL
    How it Fits A Little Small
    Age 45 - 54
    Jean Size 32, 14
    Sieve Brief in Slate
    Reviewing
    Sieve Brief in Slate
    Rated 5 out of 5 stars
    Undies

    I love them!

    Was this helpful?
  • Oihana
    Verified Buyer
    Size Purchased S
    How it Fits True to Size
    Age 35 - 44
    Jean Size 26
    Yesterday
    Size Purchased S
    How it Fits True to Size
    Age 35 - 44
    Jean Size 26
    Sieve Brief in Coral
    Reviewing
    Sieve Brief in Coral
    Rated 5 out of 5 stars
    Fit super !!!

    I really like how it fits in my body.

    Super !!!

    Was this helpful?
  • Ipsa L.
    Verified Buyer
    2 days ago
    Sieve Brief in Buff Boa
    Reviewing
    Sieve Brief in Buff Boa
    Rated 5 out of 5 stars
    Super Comfy!

    Literally some of the most comfortable underwear i have ever purchased. A bit pricey but the quality explains the price point.

    Was this helpful?
  • Leilani S.
    Verified Buyer
    Size Purchased XL
    How it Fits A Little Big
    Age 45 - 54
    Jean Size 32
    2 days ago
    Size Purchased XL
    How it Fits A Little Big
    Age 45 - 54
    Jean Size 32
    Sieve Brief in Slate
    Reviewing
    Sieve Brief in Slate
    Rated 2 out of 5 stars
    I Wish….But Miss the mark

    Nice quality but the wrong style. I seem to do best with basic cotton bikini. Have wooliest and HZm right now. Looking to style it up a bit to match the negative bras I love, but these are s just to substantial. No need to order up either as they are generously sized.

    Was this helpful?
  • Michael K.
    Verified Buyer
    Size Purchased XL
    How it Fits True to Size
    Age 35 - 44
    Jean Size 14
    3 days ago
    Size Purchased XL
    How it Fits True to Size
    Age 35 - 44
    Jean Size 14
    Sieve Brief in Navy
    Reviewing
    Sieve Brief in Navy
    Rated 5 out of 5 stars
    Great Fit

    Super Sey and Fit Great

    Was this helpful?
Reviews LoadedReviews Added
Detail view of Sieve Brief in Slate for sizer

@negativeunderwear