Buy more, save money
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
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

Sieve Brief Custom 2-Pack

4.5
Rated 4.5 out of 5 stars
480 Reviews

Ultra low rise. Honeycomb micromesh.


Sieve fan? Meet your matching bottom and feel all sorts of pulled together.
XS S M L XL XXL
XS S M L XL XXL
XS S M L XL XXL
XS S M L XL XXL
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
Zip Code
Save
Invalid zip code

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 items are either exchange only or final sale. Any item marked as "exchange only" are eligible for direct size exchange only (aka no refunds). Items marked as "final sale" are not eligible for returns or exchanges.
  • 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
View full details
4.5
Rated 4.5 out of 5 stars
Based on 480 reviews
480 reviews
  • Kristine D.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age 35 - 44
    Jean Size 29
    20 minutes ago
    Size Purchased M
    How it Fits True to Size
    Age 35 - 44
    Jean Size 29
    Sieve Brief in Buff
    Reviewing
    Sieve Brief in Buff
    Rated 4 out of 5 stars
    Basic and fine

    Simple but cute

  • Jennifer J.
    Verified Buyer
    Size Purchased S
    How it Fits True to Size
    Age 45 - 54
    Jean Size 27, 4
    1 week ago
    Size Purchased S
    How it Fits True to Size
    Age 45 - 54
    Jean Size 27, 4
    Sieve Brief in Black
    Reviewing
    Sieve Brief in Black
    Rated 5 out of 5 stars
    Perfect

    Sexy

  • Rashmi N.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age 45 - 54
    Jean Size 26
    1 month ago
    Size Purchased M
    How it Fits True to Size
    Age 45 - 54
    Jean Size 26
    Sieve Brief in Buff
    Reviewing
    Sieve Brief in Buff
    Rated 5 out of 5 stars
    Gorgeous color and fit

    So happy with my brief purchase and I will be getting this one in cherry red. Absolutely love how sexy Negative's bras and underwear make me feel.

  • Jennifer D.
    Verified Buyer
    Size Purchased S
    How it Fits True to Size
    Age 45 - 54
    Jean Size 26
    1 month ago
    Size Purchased S
    How it Fits True to Size
    Age 45 - 54
    Jean Size 26
    Sieve Brief in Slate
    Reviewing
    Sieve Brief in Slate
    Rated 5 out of 5 stars
    Nice fit

    I generally prefer thongs or when wearing briefs, cotton. I loved these didn’t notice them at all.

  • Hillory D.
    Verified Buyer
    Size Purchased XS
    How it Fits True to Size
    Age 35 - 44
    Jean Size 25, 2
    1 month ago
    Size Purchased XS
    How it Fits True to Size
    Age 35 - 44
    Jean Size 25, 2
    Sieve Brief in Buff
    Reviewing
    Sieve Brief in Buff
    Rated 4 out of 5 stars
    Beautiful Brief!!

    I love the look of this underwear, I originally ordered a size small, but the fabric is kind of stiff and the whole fit felt slightly too big so I returned those and got these in an xs and it’s perfect. I’m 5’2, 120 pounds for reference. I’m a mix between pear shape and hour-glass, which is why I originally opted for the size small because I am bigger in my butt/hips area than I am in my waist and I didn’t want it to be too tight or too small but the extra small really are perfect. And I’ll just add that I also bought The whipped boy short in an extra small and those are by far my favorite, I’m planning on going back to buy more of those and I’m happy that I bought these briefs they’re not Nearly as comfortable or soft

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