Give $20, get $20. Win win.
Free US shipping on orders over $100. Easy returns.
Skip to main content
Your cart
[Adelina XS]
[Adelina XS]
[Adelina XS]
[Morgan M]
[Morgan M]
[Morgan M]
Thumbnail image #1 of Sieve String Thong in Buff [Adelina XS]
Thumbnail image #2 of Sieve String Thong in Buff [Adelina XS]
Thumbnail image #3 of Sieve String Thong in Buff [Adelina XS]
Thumbnail image #4 of Sieve String Thong in Buff [Morgan M]
Thumbnail image #5 of Sieve String Thong in Buff [Morgan M]
Thumbnail image #6 of Sieve String Thong in Buff [Morgan M]
[Adelina XS]
[Adelina XS]
[Adelina XS]
[Morgan M]
[Morgan M]
[Morgan M]

Sieve String Thong

4.8
Rated 4.8 out of 5 stars
180 Reviews

Barely there thong. Semi sheer mesh.


Under where? Our most minimal cut, now in our best selling Belgian micromesh.
BlackBuffWhiteBuff + WhiteSlateNavyPeachCoral

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
  • Thin elastic waistband won’t dig
  • A caramel-y sunrise desert sands affogato tone
  • Our most minimal, seamless underwear option
  • Can be worn around the hips or pulled high to the natural waistline
  • 74% Polyamide (Nylon) and 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

Looks good with ->

Sieve Non-Wire Bra in Buff Sieve Non-Wire Bra in Buff (alternate view) Sieve Non-Wire Bra in Buff $70 +
Sieve Cutout Bra in Buff Sieve Cutout Bra in Buff (alternate view) Sieve Cutout Bra in Buff $70 +
Sieve Cutout Bra in Buff Boa Sieve Cutout Bra in Buff Boa (alternate view) Sieve Cutout Bra in Buff Boa $70 +
Sieve Trim Bralette in Buff Boa Sieve Trim Bralette in Buff Boa (alternate view) Sieve Trim Bralette in Buff Boa $70
4.8
Rated 4.8 out of 5 stars
Based on 180 reviews
Write a Review (Opens in a new window)
180 reviews
  • Susan B.
    Verified Buyer
    Size Purchased L
    How it Fits True to Size
    Age 45 - 54
    Jean Size 8
    3 minutes ago
    Size Purchased L
    How it Fits True to Size
    Age 45 - 54
    Jean Size 8
    Sieve String Thong in Buff + White
    Reviewing
    Sieve String Thong in Buff + White
    Rated 5 out of 5 stars
    Fits perfect! Love it!!!

    Ahhh this fits like a glove! I’m going to be ordering more!

    Was this helpful?
  • Donna S.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age 25 - 34
    Jean Size 6
    23 hours ago
    Size Purchased M
    How it Fits True to Size
    Age 25 - 34
    Jean Size 6
    Sieve String Thong in Navy
    Reviewing
    Sieve String Thong in Navy
    Rated 5 out of 5 stars
    Great thong

    Absolutely fabulous thong, great fit and quality.

    Was this helpful?
  • Judith H.
    Verified Buyer
    Size Purchased S
    How it Fits True to Size
    Age 55 - 64
    Jean Size 27, 4
    Yesterday
    Size Purchased S
    How it Fits True to Size
    Age 55 - 64
    Jean Size 27, 4
    Sieve String Thong in Buff + White
    Reviewing
    Sieve String Thong in Buff + White
    Rated 5 out of 5 stars
    Love these!

    Great quality. Love the fit and the pale color. I bought a small. I’m 5’4”, weigh 123lbs.

    Was this helpful?
  • Bev A.
    Verified Buyer
    Size Purchased M
    How it Fits True to Size
    Age 55 - 64
    Jean Size 27
    2 days ago
    Size Purchased M
    How it Fits True to Size
    Age 55 - 64
    Jean Size 27
    Sieve String Thong in Buff
    Reviewing
    Sieve String Thong in Buff
    Rated 5 out of 5 stars
    Another great piece

    Fits great

    Was this helpful?
  • Cary H.
    Verified Buyer
    Size Purchased S
    How it Fits A Little Small
    Age 55 - 64
    Jean Size 27
    3 days ago
    Size Purchased S
    How it Fits A Little Small
    Age 55 - 64
    Jean Size 27
    Sieve String Thong in Navy
    Reviewing
    Sieve String Thong in Navy
    Rated 5 out of 5 stars
    As expected

    Very thin, low-profile. Will buy in other colors

    Was this helpful?
Reviews LoadedReviews Added
Detail view of Sieve String Thong in Buff for sizer

@negativeunderwear