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

Sieve Thong Custom 2-Pack in

4.8
Rated 4.8 out of 5 stars
995 Reviews

Low rise. Semi sheer mesh.

A low rise thong in our airy light, subtly sheer, naturally smoothing Belgian micromesh.
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong Custom 2-Pack
Sieve Thong in Black
Sieve Thong in Buff
Sieve Thong in Buff + Black
Sieve Thong in Buff + White
Sieve Thong in Cherry
Sieve Thong in Coral
Sieve Thong in Coral + White
Sieve Thong in Glacier
Sieve Thong in Graphite
Sieve Thong in Haze
Sieve Thong in Moon
Sieve Thong in Navy
Sieve Thong in Peach
Sieve Thong in Slate
Sieve Thong in White
Sieve Thong 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, dry flat

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
4.8
Rated 4.8 out of 5 stars
Based on 995 reviews
995 reviews
  • Kirsten K.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age 35 - 44
    Jean Size 27
    17 hours ago
    Size Purchased M
    How it Fits True to Size
    Age 35 - 44
    Jean Size 27
    Sieve Thong in Coral
    Reviewing
    Sieve Thong in Coral
    Rated 5 out of 5 stars
    Great fit

    Very sexy. Quality material

  • Tad S.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age 55 - 64
    21 hours ago
    Size Purchased M
    How it Fits True to Size
    Age 55 - 64
    Sieve Thong in Buff + White
    Reviewing
    Sieve Thong in Buff + White
    Rated 5 out of 5 stars
    Perfect gift

    Bought them as a surprise for my wife. SHE LOVES THEM!

  • Kim T.
    Verified Buyer
    Size Purchased S
    How it Fits True to Size
    Age 35 - 44
    Jean Size 26
    22 hours ago
    Size Purchased S
    How it Fits True to Size
    Age 35 - 44
    Jean Size 26
    Sieve Thong in Coral
    Reviewing
    Sieve Thong in Coral
    Rated 5 out of 5 stars
    New obsession

    These are my new fav. Love the fit, color and style. Definitely getting more

  • Shanae D.
    Verified Buyer
    Size Purchased S
    How it Fits A Little Big
    Age 25 - 34
    Jean Size 27
    Yesterday
    Size Purchased S
    How it Fits A Little Big
    Age 25 - 34
    Jean Size 27
    Sieve Thong in Black
    Reviewing
    Sieve Thong in Black
    Rated 5 out of 5 stars
    My favorite pair of underwear

    I’ve replaced all my underwear with Negative. On some items, sizing can be tricky. Some products I’m better suited for an XS and others a S. Nonetheless, great quality and very comfortable.

  • Toby C.
    Verified Buyer
    Size Purchased XS
    How it Fits True to Size
    Age 35 - 44
    Jean Size 2
    Yesterday
    Size Purchased XS
    How it Fits True to Size
    Age 35 - 44
    Jean Size 2
    Sieve Thong in Buff + Black
    Reviewing
    Sieve Thong in Buff + Black
    Rated 5 out of 5 stars
    Cool and comfortable

    The item looks great and feels even better than I imagined. I am going add more to my collection.

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