The non-toxic period thong made for women who read labels.
Leakproof TENCEL™ Thong
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PFAS-free
300+ wears
CPSIA Certified
First Pair Promise
Made in LA
Machine washable
Period protection you'll forget you're wearing.
The everyday thong that quietly handles your period — no tampons, no bulk, no second-guessing. Just soft TENCEL™ Modal against your skin and a hidden 3-layer gusset doing all the work.
White pants on day two? Go for it.
A slim, breathable liner absorbs up to 3 regular tampons' worth (15ml) and keeps you leak-free for up to 12 hours — through your period, light bladder leaks, and everyday discharge. You'll feel nothing but soft fabric, because that's all your skin should touch.
Why women switch and never go back
- Feels like nothing. Quick-dry top layer wicks moisture away instantly — no damp, no shift, no reminder it's there.
- Holds more than you'd think. Up to 3 regular tampons or 4 pads (15ml), leakproof for up to 12 hours.
- Toxin-free, always. PFAS-free and made with natural TENCEL™ Modal. Proudly made in Los Angeles.
- Fresh all day. Breathable fibers reduce odor-causing bacteria by 99%+ and the liner gets more absorbent the longer you own it.
- Pays for itself. 300+ wears per pair means no monthly tampon or pad runs, less spending, and far less waste.
The 3-layer gusset, simply put
- Quick-dry top layer pulls moisture off your skin for a cool, dry feel.
- Absorbent core locks it away and neutralizes odor.
- Waterproof, toxin-free barrier keeps every leak contained — no VOCs, no harsh chemicals.
How to use it (easier than you think)
Wear it like your favorite thong on lighter days, or as backup on heavier ones. When you're home, rinse in cold water until it runs clear, toss in the wash, and hang to dry. No soaking, no special detergent.
New to period underwear?
Start with one cycle. Wear it true to your usual underwear size. Most women order two more within the month.
Fit & Fabric
Fits true to usual underwear size.
Measurements
- XS - 24" Waist
- S - 25.5" Waist
- M - 28" Waist
- L - 29" Waist
- XL - 31" Waist
* If you are in between sizes we recommend sizing up
Learn more about the benefits of TENCEL™ in our Fabric Guide.
Washing Care
- Cool machine delicate or hand wash
- Tumble dry low or line dry in shade
- Do not bleach
Our fabrics are tested to withstand 300+ washes without losing performance. The care tips above help preserve the feel and stretch for longer, but they’ll still look and feel amazing even with your normal laundry routine.
Shipping & The First Pair Promise
- Fast delivery with easy order tracking
- First pair not right? Free size exchange or full store credit within 30 days. Learn more.
Not all underwear is created equal.
|
The Industry Standard |
|---|---|
| Certified Body-Safe Materials | Harsh, Toxic Materials |
| Tailored for Comfort, Not Leaks | Leaky, Sweaty, Odor-Causing |
| Made with TENCEL™ Modal | Cheap, Synthetic Fibers |
| Designed for Vaginal Health | Ignores What Your Body Needs |
Frequently Asked Questions
How much flow can the Leakproof TENCEL™ Thong handle?
The 3-layer gusset handles light to moderate flow. Its ZORB® core absorbs 20× faster than cotton, bamboo, or hemp, so you stay cool, dry, and protected.
Can I wear it instead of a tampon or liner?
Yes — protection is built right in. No tampons and no liners needed.
Is it non-toxic?
Yes. It's PFAS-free with no forever chemicals, and the waterproof ProSoft® ECO-PUL™ base is completely toxin-free and bonded without solvents (zero VOCs).
What size should I get?
It fits true to your usual underwear size (XS ≈ 24" waist up to XL ≈ 31" waist). If you're between sizes, we recommend sizing up.
How do I wash and care for them?
Cool machine (delicate) or hand wash, then tumble dry low or line dry in shade. Do not bleach. They're tested to withstand 300+ washes.
What if the fit isn't right?
You're covered by our First Pair Promise: a free size exchange or full store credit within 30 days.