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Leakproof Seamless Thong

Leakproof Seamless Thong

Light Absorbency
Replaces 1+ liner or 2+ light tampons
$30
$0 $30
Sale Sold out
Absorbency
Size
Color: Volcanic Black
Limited Edition

Buy 3+ save 10% | 5+ save 15% | 7+ save 20%

  • Made with super stretchy fabric and smooth bonded seams for a second-skin fit
  • EE369C55-C832-48FE-BB1F-D7D5B2E8292F Created with sketchtool.
    Not treated with PFAS
  • Thinnest and driest gusset technology
  • Machine washable

Slip into any outfit without rethinking your underwear.

This is the pair you put on and then promptly forget about. The one that lets you pull on leggings and skip the half-squat mirror check. Sleek, super-stretchy fabric and bonded edges create a smooth, second-skin feel that moves with you. Finished in barely-there nude shades that blend beautifully. The patented thinnest and driest gusset delivers light protection for light period leaks, discharge, and sweat, without bulk or stiffness.

Fabric

Sleek, super-stretchy body fabric gives you all the freedom with none of the panty lines. Made with 4-way stretch fabric and luxe bonded seams that move with you. Second-skin fit glides so smoothly, you'll forget you're wearing anything.

  • Body: 62% polyamide, 38% elastane
  • Lining: 92% recycled polyester, 8% elastane, polyurethane
  • Gusset: 100% polyester

How It Fits

  • Mid-rise with no panty lines
  • Seamless body fabric is ultra-stretchy and hugs the body. It's great for those who want no VPL under even the tightest-fitting clothing, or for those who prefer stretch that accommodates body changes. If you're between sizes, consider sizing down for the best fit.

Seamless

Runs true to size
Runs small
Runs big

Care Instructions

After use, rinse your Saalt Wear leakproof underwear in cold water to help avoid staining. Then, hand wash or machine wash on cold, preferably in a Saalt Mesh Laundry Bag intended for delicates. You can use detergent but pass on the fabric softener, bleach, or iron to protect the tech. Proudly hang dry—energy efficient and free. We recommend avoiding putting Saalt Wear in the dryer, as high temperatures can degrade the elastics and fabric over time.

90-Day Saalt Bliss Guarantee

Love it or we’ll make it right. Love your Saalt products, or you have 90 days to return or exchange them. Why? We know that learning to use reusables can take time, but we're here to help and cheer you to Saalt bliss. Your Saalt(isfaction) guaranteed.

Please note: If you’re trying Saalt Wear for the first time, we recommend starting with one pair before opening the rest. Unopened pairs are eligible for a refund, while the first pair you try can be exchanged for store credit if needed.

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Saalt Wear Size Chart

  Waist (in) Hips (in) Pant Size (US) Trouser Size (UK) Youth Size
XXS 23" 29 - 30" 0 0 - 2 9 - 10
XS 24 - 25" 30 - 33" 0 - 2 4 - 6 11 - 12
S 26 - 27" 33 - 37" 2 - 4 6 - 8 13 - 14
M 27.5 - 29" 38 - 40" 6 - 8 13 - 14 15 - 16
L 29.5 - 31.5" 41 - 44" 10 - 12 14 - 16
XL 32.5 - 34.5" 45 - 46" 14 - 16 18 - 20
2XL 35.5 - 38" 47 - 50" 18 - 20 22 - 24
3XL 39 - 43" 51 - 54" 22 - 24 26 - 28
4XL 44 - 48" 55 - 58" 26 - 28 30 - 32
Waist measurement diagram
  1. Measured at your belly button.
  2. Measured around the widest part of your hips.

Comfort

Runs true to size
Runs small
Runs big

Cotton

Runs true to size
Runs small
Runs big

Lace & Mesh

Runs true to size
Runs small
Runs big

Seamless

Runs true to size
Runs small
Runs big

Saalt Cup Size Chart

70mm
Regular Saalt Cup

Saalt Regular

  • Normal to heavy flow
  • 3 - 4 tampon capacity
  • 30 ml capacity

Recommended for:

  • High cervix
  • Post-childbirth
70mm
Small Saalt Cup

Saalt Small

  • Light to normal flow
  • 2 - 3 tampon capacity
  • 25 ml capacity

Recommended for:

  • Low cervix
  • First-time cup user and 18 years or older
56mm
Teen Saalt Cup

Saalt Teen

  • Light to normal flow
  • 1 - 2 tampon capacity
  • 15 ml capacity

Recommended for:

  • Low cervix
  • Under 18 years old or petite physique

Saalt Disc Size Chart

66mm
Regular Saalt disc

Saalt Disc Regular

  • Normal or heavy flow
  • 5 - 6 tampon capacity
  • 50 mL volume

Recommended for:

  • New disc user
  • High cervix
  • Trouble keeping menstrual discs inserted
56mm
Small Saalt Disc

Saalt Disc Small

  • Light or normal flow
  • 3 - 4 tampon capacity
  • 30 mL volume

Recommended for:

  • Light flow
  • Low cervix
  • Teens or young adults

Teen Saalt Wear Size Chart

Youth Size Waist (inches) Hips (inches)
S (9-12) 23 - 24" 29 - 31"
M (11-12) 24.5 - 25.5" 31.5 - 32.5"
L (13-14) 26 - 27" 33 - 35"
XL (15-16) 27.5 - 29" 36 - 38"

Waist measurement diagram

  1. Measured at your belly button.
  2. Measured around the widest part of your hips.

Bralette Size Chart

Cup/Band 30" 32" 34" 36" 38" 40" 42"
A XS XS S M L XL XXL
B XS XS S M L XL XXL
C XS S S M L XL
D XS S M L XL XXL
DD S M L XL XXL
Bra measurement diagram
  1. Bust Measurement:
    Wearing a bra with no padding (preferably with an underwire to give the needed lift), measure around the fullest part of your bust. Round the measurement to the nearest inch.
  2. Band Measurement:
    Measure around the top of your rib cage where the bottom band of the bra will rest. Round the measurement to the nearest inch.
    Not sure about your cup size? Subtract your band measurement from your bust measurement. A difference of 1"=A, 2"=B, 3"=C, 4"=D, 5"=DD.

hanky panky+ [powered by Saalt] Size Chart

  Waist (in) Hips (in) Dress Size (US)
XS 24 - 25" 34 - 35" 0 - 2
S 26 - 27" 36 - 37" 4 - 6
M 28 - 29" 38 - 39" 8 - 10
L 30 - 33" 40 - 43" 12 - 14
XL 34 - 37" 44 - 46" 14 - 16
One Size 36 - 45" 4-14
Waist measurement diagram
  1. Measured at your belly button.
  2. Measured around the widest part of your hips.

Super Absorbency

Holds up to:
8+ tampons
6+ pads
Best for:
  • Heaviest flow days and overnight
  • Bladder leaks
  • Postpartum wear

Heavy Absorbency

Holds up to:
4 tampons
3 pads
Best for:
  • Heavy flow days and overnight
  • Postpartum wear
  • Bladder leaks

Regular Absorbency

Holds up to:
3 tampons
2 pads
Best for:
  • Sweat and discharge
  • Worry-free backup to a cup, disc or tampon
  • Regular period flow
  • Light bladder leaks

Light Absorbency

Holds up to:
2+ light tampons
1+ liner
Best for:
  • Sweat and discharge
  • Worry-free backup to a cup, disc or tampon
  • Light flow days and spotting
  • Pantyliner replacement

9/10 People Never Go Back

  • Jessica J

    I bought myself a few pairs and I'm not kidding when I say they are so comfortable and fit perfect, I would wear them every single day!!! I feel so good about replacing all the pantyliners I use when I am on my period. Thank you Saalt!

  • Euna

    I wanted to avoid panty lines and the bulk of pads while still wearing leggings at the gym. My solution was Saalt's seamless underwear. I was skeptical at first, but honestly they're very thin and comfortable making it the perfect thing to wear under leggings.

  • Michelle C.

    These are great! The period panties I've ordered from other brands feel like thin diapers mixed with granny panties. These are cute, they work, and I'm definitely going to buy more!

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Premium Design. Comfortable Fit.

Welcome to the thinnest, driest, and most comfortable leakproof underwear you'll ever wear.

  • Patented gusset

    technology

  • Reusable and replaces hundreds of pads and liners

  • Worry-free backup to a tampon, cup or disc

  • Not treated with PFAS
Female wearing leak-proof underwear

Your one-stop (sustainable) shop for all leaks.

Leakproof period underwear designed to withstand laughing with your best friend, the sweat of spin class, vivacious sneezes, and periods. It does it all, just like you.

Female placing period underwear in Saalt packaging

Take good care of Saalt Wear leakproof underwear and it will take great care of you.

  • Rinse in cold water

  • Machine wash cold

  • Proudly hang dry

Do not use fabric softener or bleach to protect the tech | Do not iron

Serang Monastery Female holding skin tone colored period underwear

Do good every wear.

Saalt is a B Corp. That means we use business as a force for good and give 1% of revenue to donate period care to women and girls in need.

Overall rating: 4.416974 / 5 from 271 reviews.

AI Generated Review Summary

The Leakproof Seamless Thong by Saalt offers a seamless, second-skin fit with super-stretchy fabric and bonded seams, providing comfort and protection for light period leaks, discharge, and sweat. Customers appreciate its quality, fit, and material, though some have mixed feelings about the fabric and cut. It serves as a reliable backup for menstrual products and everyday protection.

Summary topics

  • Product Quality: 7%
  • Product Feel: 9%
  • Product Fit: 15%
  • Product Material: 7%
  • Liner Comfort: 7%

Review topics: ["size","protection","quality","absorbency","color","weight","smell","fit","feel","body","material","issues","coverage","customer service","comfort","liner","style","light","works","thong","underwear","leaks","period","fabric","undies","panties","cut","seamless","wear","flow"].

Review highlights

  • "I love the fabric, it feels well made, and keeps me feeling clean and hygienic." — Lindsay T.
  • "The material is high quality and so comfortable." — Allison C.
  • "This thong is light weight, seamless, just enough protection on a lighter period day and I love the deep red color." — Laura Z.

Reviews

Cute and comfy

"Never thought I would wear a thong again but this gives enough leak protection that I can get away with it now and then."

— Kathleen W. (5/5)

great underwear!

"i almost only wear thongs and i love these! kept me dry on the day i was coming off my period!"

— Brooke C. (5/5)

Super comfortable for light or non period days

"These are so comfortable and flattering I’d wear them when not on my period. They would be good for sweaty gym days when you want something that won’t show under your leggings. That said, I would only wear them as backup to other methods during my period. They fit more snug than other saalt underwear. For example the S fits me in these but I would wear a XS in most other saalt styles."

— Holli H. (5/5)

Almost no absorbance

"The pad is so thin that it is useless. I regret making this purchase."

— Courtney F. (2/5)

Cute & cozy

"This one is my favorite! I would size up because they were a little snug. I normally wear a medium, and I got a large and they fit perfectly."

— Kayla B. (5/5)

Better than expected!

"I got these thinking they would t work well, but was I surprised! I head a light flow day and I hate using any sort of waste feminine products. Trying to go more green. I took a gamble with getting these and it paid off. I had no leaks. I was also concerned about any odd odors that naturally come with having my period. . . . there are no concerns with these."

— L P. (5/5)

White jeans approved!

"Very comfortable and slim-lined while also providing peace of mind. Especially while traveling in white jeans!"

— Katharine R. (5/5)

Material is SO soft!

"It fits comfortably and it’s a good fabric. I have yet to test it with my period, but I don’t know if I would trust it fully without a disc/cup, because the gusset isn’t nearly as wide as what I would’ve thought. However, it is for lighter days and I would recommend it for at the tail end of your cycle!"

— Abby S. (4/5)

Love love love. Light weight.

"Love love love. Light weight. Comfortable fit. Soft."

— TaniA M. (5/5)

Very comfortable

"I had given up on wearing thongs because of my minor incontinence issues but these thongs are so comfortable and make me feel confident I won't have any embarrassing leaks."

— Sherry T. (5/5)

Q&A

90-Day Saalt Bliss Guarantee

Love it or we’ll make it right. Love your Saalt products, or you have 90 days to return or exchange them. Why? We know that learning to use reusables can take time, but we're here to help and cheer you to Saalt bliss. Your Saalt(isfaction) guaranteed.