Cotton Bikini
Cotton Bikini is crafted from soft, breathable cotton for all-day comfort with discreet leakproof protection. Designed for light flow, spotting, or everyday wear, this reusable low-rise style offers a comfortable, sustainable alternative to disposable period products.
Free Shipping Details
Enjoy free shipping to these regions with a minimum order value:
- Europe, USA, Canada, Japan, and Australia: Free on orders over €59
- Mainland China, Hong Kong, and Taiwan: Free on orders over €49
Delivery Times
- United Kingdom & USA: 7–10 business days
- Most EU countries: 8–12 business days
- Australia: 5–8 business days
- Japan: 4–6 business days
- Mainland China, Hong Kong & Taiwan: 2–4 business days
Taxes & Duties
We’ve got you covered—taxes are pre-paid at checkout by Relief.
Returns
We accept returns for unopened packages with the safety seal intact, within 30 days of delivery. Choose a full refund or store credit for your next purchase.
Cotton Bikini is crafted from soft, breathable cotton for all-day comfort with discreet leakproof protection. Designed for light flow, spotting, or everyday wear, this reusable low-rise style offers a comfortable, sustainable alternative to disposable period products.
Free Shipping Details
Enjoy free shipping to these regions with a minimum order value:
- Europe, USA, Canada, Japan, and Australia: Free on orders over €59
- Mainland China, Hong Kong, and Taiwan: Free on orders over €49
Delivery Times
- United Kingdom & USA: 7–10 business days
- Most EU countries: 8–12 business days
- Australia: 5–8 business days
- Japan: 4–6 business days
- Mainland China, Hong Kong & Taiwan: 2–4 business days
Taxes & Duties
We’ve got you covered—taxes are pre-paid at checkout by Relief.
Returns
We accept returns for unopened packages with the safety seal intact, within 30 days of delivery. Choose a full refund or store credit for your next purchase.
Trusted by 4,000 women
Carmen Amador
Founder of The Cycle Method
“I've had period underwear for years, but Relief is the ONLY brand that actually looks sexy AND doesn't feel like period underwear at all. I'm obsessed — everyone needs a pair!”
Eden Chiang
Co-founder of The Oh Collective
“Relief has completely won me over. The gusset keeps me feeling secure and protected even on my heaviest days. It's become an essential part of my period routine, and I'd recommend it to anyone who wants sustainability and reliability in one.”
Melina Mauro
Registered Dietitian
"With PCOS (now called PMOS), when my cycle will start is always a mystery. Between irregular cycles and heavy discharge in my luteal phase, I pretty much wear period underwear all month. Relief is one of the best I've tried — so many styles and absorbency levels that it's easy to find one that suits me. If you think period underwear is bulky or unsexy, you just haven't tried Relief yet."
Leakproof TLC
(Tender Laundry Care)
Pre-wash
Give them a quick rinse or soak in cold water to keep stains from setting. (Psst! Regular soap isn’t their BFF—it can mess with the gusset’s wicking magic.)
Dry
Hang them up to air dry or use a low-heat tumble for most styles. (Important: Seamless styles must be air-dried only to keep them in perfect shape!)
Your Questions Answered
Leak-proof underwear are basically regular underwear with an innovative built-in gusset to absorb your flow of the cycle while keeping you fresh and dry. They are reusable and machine washable, and feel just like regular underwear.
In general, if you’re a tampon or menstrual cup user, start by getting 2-3 light absorbents as a back-up and for lighter days. If menstrual underwear is the only thing you use, you’ll need 4-7 pcs in total to cover the whole cycle, depending on your flow.
With proper care, your Relief underwear can last 2-3 years, as long as the absorbency is still effective and the underwear keeps its shape.
- MMariaReviewingDetachable String BikiniI recommend this productRated 5 out of 5 starsThis is my fav!
So light, breathable and nothing digs or cuts in my thigh! I don't feel I am wearing anything!
I use this and a cup. And they made my period so much easier. HIGHLY recommend this brand to anyone who is fed up with bulky styles on the market.