The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows
The Bikini Period. in SportyStretch™ For Heavy Flows

The Bikini Period. in SportyStretch™ For Heavy Flows

4.6
Rated 4.6 out of 5 stars
635 Reviews
$10.50
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1 pair absorbs 9 tampons of flow

Leak-free, super-absorbent, designed to withstand ultra-movement and sweat.  Absorbs up to 9 tampons worth of flow!

Your favorite bikini can now do a marathon, a spin class, a barre class, you name it! Or I’m just great for a busy day of running around.  I’m currently the world champion in being waste-free and super-absorbent.

The Sporty. Bikini is made from our PeriodTech® fabric - a super stretchy Nylon and Spandex knit that moves with you. As always, the gusset is made with organic cotton.

When To Wear: doing a marathon, going to the supermarket, and everything in between.

Trying to do period math? Click here to work out how many pairs you need for your period according to your Flow Threshold.

This style runs true to size. Order your most standard size. 

You can see our size chart here.

Our Fabrics

Main: PeriodTech™ 95% Nylon with 5% Spandex Knit

Lining: 95% Organic Cotton with 5% Spandex Jersey

Absorbent Layer: 88% Polyester with 12% Nylon 

Leak Resistant Layer: 100% Polyester PUL

 

How to take care of your Period.

Rinse any fresh blood off in the sink or the shower.

Hang to dry then add to your laundry pile. 

Machine wash warm, no bleach.

Tumble dry low. Do not dry clean or iron. 

Each pair of Period. underwear can hold up to 10 tbls, or 8-10 tampons, worth of blood.

Check out our absorbency test video here.

How long will one pair of Period. last?

Everybody periods differently so it’s tough to be exact. Our average time is about 8 hours on a heavier flow day. Though some customers need to change after 3 to 4 hours, and others can go up to 14 hours (lucky them!). As your period gets lighter, one pair can take you through the day and night (just like regular underwear). But again, everybody Periods differently, so you need to take one cycle to figure out exactly how often you need to change. Start with a conservative estimate on your heavy days, and check in on your Period underwear after 4 hours. If you still feel good, give it another hour. Keep going until you figure out your limit. Here at Period, we find we need between 3 to 4 pairs on the first two heavy days, including evenings. And if you leak, please forgive us! Just this once. (Remember how many tampons you have forgiven). Treat the ‘leak’ as a gift and note the hour of your leakage. That is the best indicator of your ‘flow threshold’ how long the underwear will last for you.

Message from a Cheetah: Hi! You know me. You know how much I love to run. Running is the best thing in the universe. The only that ruins it is when you run past a decomposing tampon or pad. Man, that sucks. There are some things you can't unsee and that's one of them. But not for much longer! With incredible people like you, we're going to end all this ridiculous waste and make my runs fantastic again. Kudos.

4.6
Rated 4.6 out of 5 stars
Based on 635 reviews
Total 5 star reviews: 480 Total 4 star reviews: 98 Total 3 star reviews: 44 Total 2 star reviews: 11 Total 1 star reviews: 2
91%would recommend this product
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How did your Period. fit compared to other underwear?Rated -0.0 on a scale of minus 2 to 2
How well did Period. absorb your flow? Rated 0.8 on a scale of minus 2 to 2
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635 reviews
  • M
    Mariah
    Verified Buyer
    I recommend this product
    What size of underwear do you typically wear? S
    What size in Period. did you purchase? M
    What do you use your Period. products for? During Exercise
    Rated 5 out of 5 stars
    24 seconds ago
    Awesome product

    These are perfect for my heavy flow days. I work 10 hour farm days in high desert heat and needed something that was going to help with a heavy flow and sweat. These are perfect and I'm super happy with the quality! I'm a size 4 and bought size medium, though I normally buy small. I bought the thongs in medium and they were too big though

    How did your Period. fit compared to other underwear?Rated -1.0 on a scale of minus 2 to 2
    How well did Period. absorb your flow? Rated 0.0 on a scale of minus 2 to 2
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  • AG
    Amy G.
    Verified Buyer
    I recommend this product
    What size of underwear do you typically wear? XL
    What size in Period. did you purchase? XL
    What do you use your Period. products for? Primary Period Protection, Overnight Protection
    Rated 5 out of 5 stars
    2 days ago
    Review

    They are very comfortable to wear all day long and through the night.

    How did your Period. fit compared to other underwear?Rated 0.0 on a scale of minus 2 to 2
    How well did Period. absorb your flow? Rated 0.0 on a scale of minus 2 to 2
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  • NH
    Nicole H.
    Verified Buyer
    I recommend this product
    What size of underwear do you typically wear? L
    What size in Period. did you purchase? L
    What do you use your Period. products for? Primary Period Protection, Overnight Protection
    Rated 5 out of 5 stars
    4 days ago
    These fit great

    I like the fit of these - they are for the heavy flow days so they would be more visible under clothing than the other flow types I ordered, but since I specifically ordered these for overnight that doesn’t bother me. And they absorb great.

    How did your Period. fit compared to other underwear?Rated 0.0 on a scale of minus 2 to 2
    How well did Period. absorb your flow? Rated 0.0 on a scale of minus 2 to 2
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  • C
    Caroline
    Verified Buyer
    What size of underwear do you typically wear? S
    What size in Period. did you purchase? S
    What do you use your Period. products for? Primary Period Protection
    Rated 3 out of 5 stars
    4 days ago
    review

    i have such mixed feelings because i really like this product but the material has been coming undone and i haven't had it for very long at all. it is super comfortable and absorbs well, but every time i wear it, i keep having to cut threads of it off because the material is literally unraveling. another product i bought previously had a similar issue but i thought it was just that particular one. i wish the material was more durable and didn't come undone so easily and so quickly.

    How did your Period. fit compared to other underwear?Rated 0.0 on a scale of minus 2 to 2
    How well did Period. absorb your flow? Rated 0.0 on a scale of minus 2 to 2
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  • P
    Primary
    I recommend this product
    Rated 5 out of 5 stars
    4 days ago
    5 Stars

    I love these! They are way more comfortable than regular underwear. And they are so absorbent! I am shocked. My periods are very heavy, so I have to wear pads with tampons. I was able to wear these for an entire day as back up instead of a maxi pad. It’s so much more comfortable to wear than a pad. Highly recommend!

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