“KT by Knix wins by a landslide simply because they have so many cute options, colors, and reviews that back up the most important fact: they work!” says Michelle Agudelo, fertility awareness educator and menstrual health practitioner at Haus of Flow. “You can swim, go to the beach, lie at the pool, or go on a boat without fear of leaking.”
The collection is sold as separates, so you can mix and match sizes and styles. Bikini tops and bottoms cost around $40 tp $45 each, while the popular Period Swim Sport One-Piece is $88.
Best Bottoms: Beautikini High Waisted Period Swimwear Bottoms
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Beautikini High Waisted Period Swimwear Bottoms
- What we love: Variety of styles; four-layer absorbent gusset can hold up to three tampons’ worth of fluid
- Worth noting: Color options are limited depending on the style
If you already have a top you love and just need a pair of period-proof swim bottoms, Beautikini is a top-rated brand on Amazon that’s not only functional but affordable.
They offer a wide range of mix-and-match styles, from swim shorts and skirts to bikini briefs to high-waisted bottoms with tummy control, with prices ranging from about $20 to $50. All of the bottoms are designed with four layers of leak-proof, water-absorbent material that can hold the equivalent of up to three tampons.
While there are some brighter color options like teal and orange available, the brand mostly sticks to basics like black, navy, and other dark hues, so you shouldn’t have a problem finding a match for your favorite swim tops.
Best for Heavy Flow: Modibodi Swimwear Hi-Leg Cheeky Bottom
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Modibodi Swimwear Hi-Leg Cheeky Bottom
- What we love: Reliable protection for heavier flows; wide range of styles and absorbency levels; made from sustainable materials
- Worth noting: Some users still report this suit works best on medium-flow days
Modibodi is an ideal choice for anyone with a heavier flow. I’m a longtime fan of their high-rise period underwear, and their swimwear, which is made from recycled materials, is just as reliable. Personal stylist Cynthia Kennedy says she trusts Modibodi’s “Super Absorbency” one-piece swimsuits (which hold up to 10 tampons’ worth of fluid) in particular because she finds them to be leak-proof, comfortable, and flattering. It’s “one of the few that actually works for heavier days” without feeling bulky, she says.
The brand has a loyal following for a reason. “I’ve been using Modibodi period swimwear for a couple of years,” says Amy Beeson, Glamour reader and cofounder of The Story Pod. “It’s my go-to now as it just makes sense to have all bases covered. The bikinis are really great for peace of mind when you know your period is due, whether you’re going in the water or not.”
That said, “heavy flow” is pretty subjective. Beeson notes that she primarily uses her Modibodi for medium-flow days or at the beginning and end of her period.
Best Sporty: Wuka Period Racerback Swimsuit
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Wuka Period Racerback Swimsuit
- What we love: The fabric is chlorine-resistant to prevent fading and wear; it’s made from sustainable recycled nylon and offers UV50+ protection
- Worth noting: Sizing varies depending on style; may not be absorbent enough for heavy-flow days
If you swim for exercise or on a team, our poll of experts suggests that Wuka period swimwear is the way to go. “One of my clients swears by these,” Kennedy tells us. “Designed for active swimmers, these stay put through laps, flips, and tough workouts—no shifting, no leaks.”
The brand focuses on performance-oriented designs, like their best-selling Period Racerback Swimsuit, which are stylish and practical while offering full coverage. A huge plus for anyone who spends a lot of time in the pool is that the fabric is chlorine-resistant to ensure it lasts. While the brand is clear that the built-in liner is best for light- to medium-flow days, it offers reliable protection that feels discreet under a team suit or on its own. If you’re looking for plus-size swimwear, you can find sizes up to 6XL on the site.
Frequently asked questions
How we chose the best period swimwear
To find the best leak-proof swimwear for this guide, we focused on what really matters: real-world performance, expert insights, and a wide variety of styles and needs. We considered specific challenges like swimming on heavy-flow days, finding suits for competitive athletes, and ensuring there wouldn’t be any visible leaks or discomfort. We gathered recommendations from women with different cycles and spoke with experts who specialize in menstrual health to get a better idea of which fabrics and designs make a real difference in the water.
Here are the key features we looked for
- Leak protection in and out of water: We prioritized suits with multilayered gussets that could handle different flow levels while preventing water from getting in and blood from getting out.
- Comfort and fit: Period swimsuits should feel like great swimwear, period. We looked for soft, nonirritating fabrics and a fit that stays put during activity without digging in, bunching, or feeling waterlogged.
- Material quality and durability: A great suit needs to last. We considered how well the materials held up to the challenges of chlorine, saltwater, and sun, and retained their shape and absorbent qualities after multiple washes (without using bleach).
- Style and discretion: We looked for a range of stylish options, from sporty one-pieces to chic bikinis, where the period-proof technology was completely invisible. You should be the only one who knows you’re wearing it.
- Brand transparency: We gave extra points to brands that are open and honest about their materials, testing methods, and manufacturing, so you can feel confident in what you’re buying.
Do period undies work as swimwear?
No, you should not wear regular period underwear for swimming. Period underwear is designed to absorb fluid, but it isn’t made with the same water-repellent materials as swimwear. In a pool or the ocean, it would quickly become saturated with water, making it heavy, uncomfortable, and unable to absorb menstrual blood effectively. Always opt for a product specifically labeled as period swimwear.
Does period swimwear smell?
Reputable brands design their period swimwear with materials that are breathable, moisture-wicking, and often antimicrobial to prevent odor. The key to keeping your swimsuit fresh is proper care. Rinsing the suit in cold water immediately after use and washing it promptly as instructed will prevent any smells from developing.
Can period swimwear go in the dryer?
No, you should never put your period swimwear in the dryer. The high heat can damage the waterproof layers, delicate fabrics, and elastic fibers that make the suit both effective and reusable. The care instructions for virtually all brands, including many of the ones we’ve listed above, specify that you should rinse the suit in cold water, machine wash on a cold, delicate cycle, and then hang it or lay it flat to dry.
