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Sieve is our signature material for semi-sheer vibes [Ksenia XS]
Low rise cut with a plush elastic band means no digging or pinching [Ksenia XS]
A low rise cheeky brief in Black honeycomb micromesh [Ksenia XS]
flat
Thumbnail image #1 of Sieve Brief in Black [Ksenia XS]
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Buy more, save money
Sieve is our signature material for semi-sheer vibes [Ksenia XS]
Low rise cut with a plush elastic band means no digging or pinching [Ksenia XS]
A low rise cheeky brief in Black honeycomb micromesh [Ksenia XS]

Sieve Brief

4.5
Rated 4.5 out of 5 stars
382 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
  • 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 Trim Bralette in Black Sieve Trim Bralette in Black (alternate view) Sieve Trim Bralette in Black $70
Sieve Balconette Bra in Black Sieve Balconette Bra in Black (alternate view) Sieve Balconette Bra in Black $78
Sieve Cutout Bra in Black Sieve Cutout Bra in Black (alternate view) Sieve Cutout Bra in Black $70 +
Sieve Non-Wire Bra in Black Sieve Non-Wire Bra in Black (alternate view) Sieve Non-Wire Bra in Black $70 +
4.5
Rated 4.5 out of 5 stars
Based on 382 reviews
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382 reviews
  • Valerie P.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age 55 - 64
    Jean Size 28
    3 minutes ago
    Size Purchased M
    How it Fits True to Size
    Age 55 - 64
    Jean Size 28
    Sieve Brief in Navy
    Reviewing
    Sieve Brief in Navy
    Rated 5 out of 5 stars
    Comfortable, Light, and Fits Beautifully

    My first pair to try them out... loved them. I will definitely be buying more, in bulk!

    Was this helpful?
  • Michelle Y.
    Verified Buyer
    Size Purchased S
    How it Fits True to Size
    Age 35 - 44
    Jean Size 27
    3 minutes ago
    Size Purchased S
    How it Fits True to Size
    Age 35 - 44
    Jean Size 27
    Sieve Brief in Navy
    Reviewing
    Sieve Brief in Navy
    Rated 5 out of 5 stars
    High quality

    Absolute high quality. I understand the pricing of this brand and it's all worth every penny. It is not just some cheap sheer material. Will definitely buy more! Next time I will try high waist.

    Was this helpful?
  • Lisa M.
    Verified Buyer
    Size Purchased XL
    How it Fits A Little Small
    Age 45 - 54
    Jean Size 32, 14
    Yesterday
    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
    2 days ago
    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
    3 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?
Reviews LoadedReviews Added
Detail view of Sieve Brief in Black for sizer

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