Free US shipping on orders over $100. Easy returns.
Skip to main content
Buy more, save money
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Thumbnail image #1 of Sieve Brief Custom 2-Pack
Thumbnail image #2 of Sieve Brief Custom 2-Pack
Thumbnail image #3 of Sieve Brief Custom 2-Pack
Thumbnail image #4 of Sieve Brief Custom 2-Pack
Thumbnail image #5 of Sieve Brief Custom 2-Pack
Thumbnail image #6 of Sieve Brief Custom 2-Pack
Thumbnail image #7 of Sieve Brief Custom 2-Pack
Thumbnail image #8 of Sieve Brief Custom 2-Pack
Buy more, save money
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack

Sieve Brief Custom 2-Pack in

4.5
Rated 4.5 out of 5 stars
377 Reviews

Ultra low rise. Honeycomb micromesh.


Sieve fan? Meet your matching bottom and feel all sorts of pulled together.
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief Custom 2-Pack
Sieve Brief in Black
Sieve Brief in Buff
Sieve Brief in Buff Boa
Sieve Brief in Coral
Sieve Brief in Haze
Sieve Brief in Navy
Sieve Brief in Peach
Sieve Brief in Slate
Sieve Brief in White Boa

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
  • A caramel-y sunrise desert sands affogato 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
4.5
Rated 4.5 out of 5 stars
Based on 377 reviews
377 reviews
  • Ipsa L.
    Verified Buyer
    3 minutes 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.

  • Michael K.
    Verified Buyer
    Size Purchased XL
    How it Fits True to Size
    Age 35 - 44
    Jean Size 14
    15 hours 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

  • Merry C.
    Verified Buyer
    Size Purchased S
    How it Fits True to Size
    Age 55 - 64
    Jean Size 27, 4
    17 hours ago
    Size Purchased S
    How it Fits True to Size
    Age 55 - 64
    Jean Size 27, 4
    Sieve Brief in Navy
    Reviewing
    Sieve Brief in Navy
    Rated 5 out of 5 stars
    Very Sexy

    Love these briefs and the fit is perfect!

  • Stacey R.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age 55 - 64
    Jean Size 28
    Yesterday
    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
    Fits great

    Glad I purchased when on sale. Wanted to try and love them.

  • William H.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age 55 - 64
    Jean Size 8, 10
    Yesterday
    Size Purchased M
    How it Fits True to Size
    Age 55 - 64
    Jean Size 8, 10
    Sieve Brief in Navy
    Reviewing
    Sieve Brief in Navy
    Rated 5 out of 5 stars
    Great fit...love the feel and look

    Feels great on and looks incredible!

Reviews LoadedReviews Added
Detail view of Sieve Brief Custom 2-Pack for sizer