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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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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

4.6
Rated 4.6 out of 5 stars
303 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 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

  • 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

Pair it with ->

Sieve Cutout Bra in Black Sieve Cutout Bra in Black (alternate view) Sieve Cutout Bra in Black $68
Sieve Non-Wire Bra in Black Sieve Non-Wire Bra in Black (alternate view) Sieve Non-Wire Bra in Black $65 +
Sieve Balconette Bra in Black Sieve Balconette Bra in Black (alternate view) Sieve Balconette Bra in Black $75
Whipped Triangle Bra in Black Whipped Triangle Bra in Black (alternate view) Whipped Triangle Bra in Black $65
4.6
Rated 4.6 out of 5 stars
Based on 303 reviews
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303 reviews
  • Lisa D.
    Verified Buyer
    Size Purchased L
    How it Fits True to Size
    Age 35 - 44
    Jean Size 34
    4 minutes ago
    Size Purchased L
    How it Fits True to Size
    Age 35 - 44
    Jean Size 34
    Sieve Brief in Coral
    Reviewing
    Sieve Brief in Coral
    Rated 5 out of 5 stars
    Love

    Pairs nicely with the Sieva Bra Top

    Was this helpful?
  • Robert B.
    Verified Buyer
    Size Purchased L
    How it Fits True to Size
    Age 45 - 54
    Jean Size 28
    1 week ago
    Size Purchased L
    How it Fits True to Size
    Age 45 - 54
    Jean Size 28
    Sieve Brief in Black
    Reviewing
    Sieve Brief in Black
    Rated 5 out of 5 stars
    Amazing fit snd feel

    Perfect

    Was this helpful?
  • Robert B.
    Verified Buyer
    Size Purchased L
    How it Fits True to Size
    Age 45 - 54
    Jean Size 28
    1 week ago
    Size Purchased L
    How it Fits True to Size
    Age 45 - 54
    Jean Size 28
    Sieve Brief in Navy
    Reviewing
    Sieve Brief in Navy
    Rated 5 out of 5 stars
    Amazing

    Perfect fit. Super comfortable!

    Was this helpful?
  • Kimberly A.
    Verified Buyer
    Size Purchased M
    How it Fits A Little Small
    Age 45 - 54
    Jean Size 28
    1 week ago
    Size Purchased M
    How it Fits A Little Small
    Age 45 - 54
    Jean Size 28
    Sieve Brief in Black
    Reviewing
    Sieve Brief in Black
    Rated 4 out of 5 stars
    ordering size larger

    Nice quality, need larger size for me

    Was this helpful?
  • Leah E.
    Verified Buyer
    Size Purchased S
    How it Fits True to Size
    Age 35 - 44
    Jean Size 28
    2 weeks ago
    Size Purchased S
    How it Fits True to Size
    Age 35 - 44
    Jean Size 28
    Sieve Brief in Navy
    Reviewing
    Sieve Brief in Navy
    Rated 5 out of 5 stars
    So comfortable

    Loved these

    Was this helpful?
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Underwear Sizing

Underwear Sizing Size Chart

Q’s about sizing or fit? Email us at hello@negativeunderwear.com

Detail view of Sieve Brief in Black for sizer

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