Live free of VPL (visible panty lines) and light leaks with our next-best-thing-to-nothing period thong. Whether you’re in a bodycon dress on day two of your cycle or just want coverage, this period thong underwear has you covered (invisibly).
Best for light flow days, spotting and discharge, everyday protection to replace a panty liner, or as a worry-free backup to a cup, disc, or tampon.
Fabric
This beautiful, lingerie-inspired underwear designed in Paris is strong, sustainable, and stunning. Just like you. Silky smooth body fabric made of post-consumer recycled water bottles, with soft-stretch European lace for the most stunning period underwear you'll own.
Body: 80% recycled polyester, 20% elastane
Lace: 61% polyamide, 39% elastane
Lining: 100% polyester
Gusset: 92% recycled polyester, 8% Spandex: PUL
How It Fits
Mid-rise with no panty lines
Body fabric for the Lace & Mesh collection fits snug. It's great for those who like a secure-feeling fit. **If you're between sizes, consider sizing up.**
Lace & Mesh
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.
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.
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
Measured at your belly button.
Measured around the widest part of your hips.
The thong you reach for, period or not
You have a period roughly 12 times a year. Your thong drawer is used the other 353.
Saalt’s period thong is designed to be the underwear you actually want to wear every single day, not just when your cycle calls for it.
It is engineered with a patented, ultra-thin absorbent core built right into the thong profile that catches flow without adding a single visible layer.
The inner moisture-wicking layers do the work. The outer lace looks like your favorite lingerie.
All in all, you get a thong that fits under everything, and period underwear that handles light flow without broadcasting the fact.
FAQs on Period Thong Underwear
How does flow-catching thong underwear differ structurally from regular thong styles?
A regular thong has one thin layer of fabric in the gusset. Saalt’s period thong has a built-in absorbent core that’s engineered to sit flat inside the same minimal silhouette. The inner layers are designed to wick moisture away from the body and lock it into an absorbent layer, while the outer lace or fabric layer remains unchanged in look and feel.
Can you wear period thong underwear under form-fitting dresses without visible lines?
Yes, that’s the entire point of period thong underwear. The Saalt Leakproof Lace Thong is mid-rise with a true thong cut, designed to disappear under form-fitting outfits. The absorbent gusset is built flush into the construction, so there’s no extra padding or bulk that creates lines or a visible profile. Wear it under a bodycon dress, tailored trousers, or anything that demands a clean silhouette. It holds its own.
What absorbency level does the Saalt leakproof thong offer?
The Saalt Leakproof Lace Thong is available in Light Absorbency, which holds 2+ light tampons or 1+ liner’s worth of flow. It’s designed for light flow days, spotting, discharge, and everyday protection as a pantyliner replacement. If you want backup coverage alongside a cup, disc, or tampon, Light Absorbency is a solid, seamless choice.
Is period thong underwear suitable for everyday wear, not just during your period?
Absolutely. Our thong period panties are built for every-day-of-the-month wear, not just the five or so days it’s named after. Wear it for discharge coverage, as a pantyliner replacement, or just because it’s the best thong you’ve put on. The Light Absorbency gusset is thin enough that it doesn’t change the feel of the style. There’s genuinely no reason to switch to a “regular” thong for non-period days.
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!
1 / of3
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
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.
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
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.
Customer Reviews
Overall rating: 4.6 / 5 from 262 reviews.
I cannot tell you how much I rely on this style. I’ve tried other styles, but the design of this lace one is the most comfortable option I’ve found.
Love this for back up protection on heavier days. Also great for beginning/end of my period. I love how it doesn't look bulky and keeps me feeling cute. I'll be getting a couple more pairs
I am a 51 year old menopausal aerial dancer who has had one vaginal delivery and sometimes I leak urine when dancing. This thong has been a lifesaver. No more darting to the bathroom in the middle of class (or performing) because I am worried that I have peed. Thank you so much for creating this amazing product.
PS I tried the mesh and seamless versions of the thong which did not work as well because of fit and Saalt was amazing at giving me a refund even though they had been worn.
When it comes to period underwear Saalt brand is the way to go. I've tried others and while they worked for being leak free the other brands haven't developed a product that leaves you feeling fresh. Somehow these panties keep you feeling dry and fresh while others make you feel stuffy with no air flow. I do feel they are a little over priced but I try to find them on sale. Also with these specific ones I bought a large (after reading reviews) and they fit perfectly. I usually wear a medium in underwear and a size 4 in pants.
My daily wear item! When you are of a certain age, sometimes when you sneeze, you might have a little dribble. These keep me comfortable, protected, and not adding to a landfill with liners.
I do think the thongs run small because I usually wear a S, but the M is very snug. I recall this is stated on their product description, so I appreciate them adding that as I can see myself returning/exchanging the S as that's what I would've gotten. Fits well, doesn't even feel like period underwear with how thin the absorbent area is. My flow is so light, I've never had leaks, I do think Saalt Wear can definitely stand up to heavier flows but can't speak to that personally.
Thin profile, solid fit, lace is even so soft. I'm usually not one to like lace but these are so soft and comfy I don't even feel like I'm wearing lace.
Have bought other period underwear brands in the past but Saalt is WAY higher quality, love their rewards program and overall the underwear are just way softer and more absorbent than other brands
Love this one too! It works! No more panty liners! Keep dry down there even when hiking all day!
Now we need this dry liner material in the bottom band of a bra to absorb boob sweat (swoob). Please create this! I will buy it@
Great period panties! I've used another brand before Saalt and they were much thicker and less comfortable in the gusset. Saalt manages to actually still be close to my 'barely there' regular panties/thongs under clothes, even workout leggings, without bunching or riding up uncomfortably. I listened to the other reviews and sized up in this style - they fit approximately the same as the size medium panties from the Light Day Medium 3-pack.
I move around a lot during my workday and so I needed a period undergarments that work...No gaps, no stiff fabric that chafes, and especially NO LEAKS. The Saalt thong performs. I use a period cup that needs a backup system (because I have had two kids vaginally). So happy with these and side note also great for those impromptu sneezes or fast moves that create a bladder surprise too.
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.
Do you have a period? Great, we're here to make it better (starting with 10% off your first order). 😉
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