Cotton String Bikini
Your favorite silhouette, now leakproof. Cotton String Bikini combines soft, breathable BCI cotton with reliable period protection in a flattering string bikini fit. Designed for light flow, spotting, or everyday confidence without sacrificing comfort or style.
Tax included. Shipping calculated at checkout.
Free Shipping Details
Enjoy free shipping to these regions with a minimum order value:
- Europe, USA, Canada, Japan, and Australia: Free on orders over โฌ59
- Mainland China, Hong Kong, and Taiwan: Free on orders over โฌ49
Delivery Times
- United Kingdom & USA: 7โ10 business days
- Most EU countries: 8โ12 business days
- Australia: 5โ8 business days
- Japan: 4โ6 business days
- Mainland China, Hong Kong & Taiwan: 2โ4 business days
Taxes & Duties
Weโve got you coveredโtaxes 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.
Your favorite silhouette, now leakproof. Cotton String Bikini combines soft, breathable BCI cotton with reliable period protection in a flattering string bikini fit. Designed for light flow, spotting, or everyday confidence without sacrificing comfort or style.
Free Shipping Details
Enjoy free shipping to these regions with a minimum order value:
- Europe, USA, Canada, Japan, and Australia: Free on orders over โฌ59
- Mainland China, Hong Kong, and Taiwan: Free on orders over โฌ49
Delivery Times
- United Kingdom & USA: 7โ10 business days
- Most EU countries: 8โ12 business days
- Australia: 5โ8 business days
- Japan: 4โ6 business days
- Mainland China, Hong Kong & Taiwan: 2โ4 business days
Taxes & Duties
Weโve got you coveredโtaxes 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
โI'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 โ everyone needs a pair!โ
Eden Chiang
Co-founder of The Oh Collective
โRelief 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.โ
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 โ 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 isnโt their BFFโit can mess with the gussetโs 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 youโre 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, youโll 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.
- CCandiceVerified ReviewerReviewingGo With The Flow BikiniI recommend this productRated 5 out of 5 starsTrรจs bon produit
L'article est bien conforme ร la description. Trรจs facile ร porter et efficace ! J'adore mes deux dรฉclinaisons bleu et orange.
- CCandiceVerified ReviewerReviewingGo With The Flow BikiniI recommend this productRated 5 out of 5 starsGo with the flow
Nice cut , comfortable and does the job!
I recommend
- ECEmi C.ReviewingBreathe CheekyI recommend this productRated 5 out of 5 starsThe Most Clever Period Underwear I've Tried
Tried this underwear with a built-in panty liner. Simple idea, but genuinely useful. No more adjusting liners around my period, and cleanup is easy. The fabric is soft and comfortable, and the colors are nicer than I expected. Worth a try if this is something that bothers you too.
- PCPia C.Verified BuyerReviewingJust About Right Brief L / Black / Heavy - 3 tamponsI recommend this productRated 5 out of 5 starsPerfect for heavy days even!
I got a pair a few months ago and i love them, i can wear them with nothing else even on my heavier days and they feel comfortable and leak-safe! I would totally re-purchase!
- PCPia C.Verified BuyerReviewingGo With The Flow BikiniI recommend this productRated 5 out of 5 starsSo comfy!
I got these in two colors and i love them, they are super comfortable and perfect for my medium-light days. Plus they look cool and the colors are cute!