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Your cart is empty.Swim comfortably in Kt by Knix Period Swim Bikini Bottoms. These bottoms hold about 3 regular tampons or menstrual pads worth of blood. These swimming bottoms have medium absorbency and are built to feel just like regular swimwear. Wear it alone on light days, or with a tampon or menstrual cup on heavy days.These bikini bottoms have a discreet liner and let you rapidly absorb sweat, moisture, and blood. At the end of the day, simply machine wash on cold and lay flat to dry.This period beachwear has an absorbent gusset that locks in blood without leaking or swelling thanks to three layers of leakproof technology. The first layer sits comfortably against the skin. The second layer holds about 3 regular menstrual pads or tampons worth of blood. The third layer is a secure, liquid-resistant layer that prevents leaks.They have a classic bikini cut, medium bum coverage, and 50+ UPF protection.It’s time that all of us lived unapologetically free. Free from judgment. Free from self-doubt. Free to be yourself. That’s why all our products, from the most comfortable wireless bras to super-absorbent underwear, are designed to make you feel more comfortable in your own skin. Using patented technology, cutting-edge processes, and human-centric design, we're creating products unlike anything you’ve ever worn. Whether it’s lightweight anti-chafing shorts, wireless bras that are sexy and supportive, or overnight period protection, we want you to be able to find something that transforms how you feel. At Knix, we aim to empower people and reduce environmental degradation by taking into consideration our impacts throughout production, transportation and consumption. Although we don’t have all of the answers yet, we believe that making progress is better than waiting for perfection. We are transforming an underwear market that had too much frill and not enough function, so you can always feel your best at any stage of life.
Kristina B
Reviewed in the United States on January 2, 2025
These were very tight. I know they're supposed to be snug to prevent leaks but this was more than snug. Also cheeky, which in my opinion is not appropriate for tweens/teens which this is advertised for.They seem like decent quality, but we returned due to the fit.
Sierra
Reviewed in Canada on September 24, 2024
This product is amazing! I'm not a tampon person so I had to find another option so that I could enjoy the water. I tried these out and they work amazing, they are super comfortable and in my experience don't leak.
Liane
Reviewed in Canada on September 19, 2024
We returned them. The back is very high and doesn’t give you comfortable coverage. I don’t know about you, but when you have your period the last thing you want to wear is a bum showing swimsuit. 😂
~KNS~
Reviewed in the United States on August 9, 2024
I’m not sure what happened. I bought my daughter’s usual size for bathing suit bottoms and they fit her well. She had them on for less than hour and they leaked down her leg. Her flow was moderate. Should we buy a smaller size? Would that matter?
AshleyRD
Reviewed in the United States on August 4, 2024
I never write reviews, but after spending an afternoon reading them for all period swimsuits on Amazon and debating which to get my daughter, I needed to report back on this one. We spent 4 hours at a waterpark doing slides and rides and walking around and swimming, and this thing held up just fine. I even checked closely when she wasn’t looking, to see if there was any red tinged water dropping from her bottoms - nothing. No signs of leaking at all. They held up perfectly and she was able to have a fun day with her cousins. Highly recommend.
Everybody Dance
Reviewed in the United States on August 4, 2024
My daughter started her period while still in elementary school, and these swim bottoms have been a game changer!! They work exactly as described, fit great, and no one is the wiser. Perfect for those wanting to maintain their lifestyle without diving into tampons.
Lis123
Reviewed in the United States on August 17, 2024
We were heading to vacation and our 12 year old who hasn't started wearing tampons yet was going to be on her period. I had heard of period swim wear from friends at work but never used them. I chose this brand because of the material, and they seemed to be the best pair on the market. I was willing to pay the price for peace of mind for my daughter on vacation. These worked perfect. I bought 2 pairs and she would switch out half way through the day. Never a single leak. My daughter is slender, 5'7 and about 120lbs and we purchased the small size. Maybe a tiny bit cheeky than her actual swimsuit but really not too bad. Dad approved. Didn't want to buy too big or felt they wouldn't protect. Worth the money!
Leslee
Reviewed in Canada on August 14, 2024
As a 30-ish year old woman, I was a little skeptical if sizing would be accurate where the product was labelled for teens, but I was reassured when I received the product. I followed the adult size chart and purchased an XL in black (size 14-16, 5 ft 3 and about 220 pounds, carry the weight largely in lower body). It fits PERFECTLY. They are a snug fit which is to prevent rolling of the waste/bum area, and are not a full coverage but are pretty dang close to full coverage. I would recommend wearing alternative first line protection on heavier days, but for lighter days, it's A++! I was in our pool for about 2 hrs and lounged around the pool for an hour or so afterwards with no sign of leakage or seepage. The quality of the product is A1 and definitely worth paying a little extra for because of the level of comfort it provides.
Natalie Worron
Reviewed in Canada on July 10, 2024
Love these for my teens! My daughter wear a women’s size 2-4 and the small fit great. Not too cheeky like most bottoms these days. Very absorbent and makes her feel so comfortable and not like she needs to miss out on any swimming! Highly recommend!
Isabella G.
Reviewed in the United States on June 26, 2024
I read a lot of reviews saying they didn’t fit or were too tight, so I was skeptical to get my normal size (M). I am 5’9”, around 145, and they fit me absolutely perfect. I am very glad I didn’t get a large.
HouseFan101
Reviewed in the United States on March 1, 2024
Great product, high quality, perfect fit and does what it intends to do: keep you protected to enjoy a day at the beach during your medium to light period days.I've used it already and am 100% satisfied.Recommend it to all who need safe, stylish, comfortable and reliable period beachwear.
Lina Quinton
Reviewed in Canada on October 28, 2024
Works well, fits a little small.
Stephanie Herrell
Reviewed in the United States on October 21, 2024
These worked great for my daughter however I would recommend sizing up at least a size or two.
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