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
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
644 Reviews
$10.50
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Buy 6+ Save 10%, Buy 9+ Save 15%

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 644 reviews
Total 5 star reviews: 484 Total 4 star reviews: 102 Total 3 star reviews: 45 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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644 reviews
  • E
    Emma
    I recommend this product
    Rated 5 out of 5 stars
    4 minutes ago
    5 Stars

    very lightweight and comfortable! the last ones i used (knix) felt so heavy and made me sweat a lot, ended up kind of dreading wearing them. love the cute color options. (tmi) havent noticed any rash or skin irritation that i did with knix, i have particulary sensitive skin and make sure to switch out frequently and rinse before washing. def would recommend to my friends!

    Was this helpful?
  • NA
    Natika A.
    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
    Rated 4 out of 5 stars
    3 days ago
    The best

    I was skeptical but these panties actually work! They got so well and I didn’t bleed through. Easy to wash and dry. I am purchasing another pair soon.

    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 1.0 on a scale of minus 2 to 2
    Was this helpful?
  • CW
    Caitlyn W.
    Verified Buyer
    I recommend this product
    What size of underwear do you typically wear? XL
    What size in Period. did you purchase? 3X
    What do you use your Period. products for? Primary Period Protection, Overnight Protection
    Rated 4 out of 5 stars
    1 week ago
    So cute!

    I love the lavender color and soft feel. They do fit a bit snugly but not enough to cause problems

    How did your Period. fit compared to other underwear?Rated -2.0 on a scale of minus 2 to 2
    How well did Period. absorb your flow? Rated 2.0 on a scale of minus 2 to 2
    Was this helpful?
  • AJ
    Andi J.
    Verified Buyer
    I recommend this product
    What size of underwear do you typically wear? S
    What size in Period. did you purchase? XS
    What do you use your Period. products for? Period Backup
    Rated 4 out of 5 stars
    1 week ago
    They serve exactly the purpose I ordered them for

    I ordered these to use as backup with a disc or cup. Despite having used those for 5+ years, I am still unable to get the hang of them completely, and leaking is not uncommon. So, I purchased these to stop buying disposable liners.

    I've used them for six months now and they are perfect for exactly what I bought them for. Some days, I just wear them and nothing happens, and some days, they are precisely the backup I need them to be. I regret not buying an additional pair or two so I'd have enough for every day of my period without washing in the middle. I actually thought the fact that the absorbent part doesn't go super far up in the back would be more of a problem for me, but surprisingly that hasn't been an issue at all.

    I contemplated small or xsmall, but ultimately went xsmall because people said in different reviews they prefer a more snug fit period underwear, and I am glad that I did. I typically wear a small or xsmall, so they fit my normal size. They are quite stretchy, as well.

    I don't disagree with other reviews, they are a bit bulky, but I expected that from this type of product anyway and honestly after six months, I'm used to it and it doesn't bother me so much. I've never used other period underwear, so I can't compare.

    I have no problems with the quality. They seem to be sturdy, and I haven't noticed any signs of damage yet. I try to rinse them out when I take them off, a little hand washing each of them with soap on my next laundry day and throw them in…

    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
    Was this helpful?
  • JE
    Jen E.
    Verified Buyer
    I recommend this product
    What size in Period. did you purchase? 2X
    What do you use your Period. products for? Period Backup
    Rated 4 out of 5 stars
    1 week ago
    Good fit - especially compared to organic cotton ones

    **Made the same review on the bikini period organic cotton for heavy flows.

    Bought the bikini period for heavy flows in both the organic cotton (black pair) and sportystretch (plum) in 2X. However, there was a noticeable size difference between the two (and while the sportystretch is a ribbed fabric, still difference is larger than it should be).

    After wearing both, can confirm that the plum/sportystretch pain fits better / as expected whereas the black/organic cotton pair is slightly looser. Not enough to cause leaks, but I also wear these as a second layer of defense overnight with my cup. Also unsure if I would be able to size down to 1X for the organic cotton, but probably.

    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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