The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows
The Bikini Period. in Sporty Stretch For Heavy Flows

The Bikini Period. in Sporty Stretch For Heavy Flows

4.5
Rated 4.5 out of 5 stars
606 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 8 to 10 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.

Discounts are not applicable to this style.

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

You can see our size chart here.

Our Fabrics

Main: PeriodTech™ 85% Nylon with 15% Spandex Knit

Lining: 95% Organic Cotton with 5% Spandex Jersey

Absorbent Layer: 100% Polyester  

Leak Resistant Layer: 100% Polyester PUL

 

How to take care of your Period.

Rinse for a few seconds.

Either hand wash and hang dry, or add to the laundry pile.

Regular wash, no bleach.

Tumble dry low or hang dry.

Do not dry clean.

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.

You can see the length of the absorbent panel 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.

4.5
Rated 4.5 out of 5 stars
Based on 606 reviews
Total 5 star reviews: 423 Total 4 star reviews: 90 Total 3 star reviews: 65 Total 2 star reviews: 23 Total 1 star reviews: 5
85%would recommend this product
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606 reviews
  • K
    Kat
    Verified Buyer
    I recommend this product
    What size of underwear do you typically wear? M
    What size in Period. did you purchase? M
    What do you use your Period. products for? Primary Period Protection
    Rated 5 out of 5 stars
    10 months ago
    Sneeze or Cough as Much as You Need, No Leaks

    I got my period yesterday, second period after getting off of depo earlier this year. I’ve always had a heavy painful flow and it is back with a vengeance….omg do I wish I had these in high school. I got home from the gym at 10:00 am, showered, put these on and have had them on until now, which is 6:12pm. I have not even had the thought of putting in a tampon. The part that looks wet in the image is somehow DRY?? I pushed a wad of toilet paper against it and its definitely absorbed everything from the day—absorbed to where, a mystery to me. There was also no bleed through on the underside of the underwear (see grey part of photo. I’ve seen at least 2 decent clots and a ton of dark blood in the toilet every time I’ve used the restroom today. I also can’t smell a thing even putting my face within a foot of the bloodied underwear after wearing for almost 8 hours. Can’t say the same if this was a pad or a tampon. I just bought 2 overnights and I’m going to get 3 more pairs of these when they’re back in stock. These are insanely good. Curious how they hold up after a wash.

    Was this helpful?
  • CA
    Christina 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? Period Backup, Overnight Protection , Light Bladder Leaks
    Rated 5 out of 5 stars
    1 year ago
    Great Product

    Why did it take so long to come up with this? I've bought other brands but Period brand panties are the best! Feel like your wearing regular panties without a diaper!!! I wear them in addition to my period pcup since i hate pads!! My mom even bought some!

    Will definitely be buying more! In a medium next time!

    Was this helpful?
  • KF
    Kristine F.
    Verified Buyer
    I recommend this product
    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 5 out of 5 stars
    2 days ago
    Great fit!

    I originally tried the high waisted which I do also like but those come all the way up to my belly button. These have good coverage and sit right above my hips. According to the size chart I should get a medium but I’m really glad I got a small. They seem very absorbent and I like the color!

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  • MW
    Meg W.
    Verified Buyer
    I recommend this product
    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 5 out of 5 stars
    2 days ago
    Works!

    Bought these for my teen to use for her cross country meets, so she doesn’t have to deal with bulky pads while running. She got to try a pair out during her first meet and said they worked great. No leaks! Fits great! She does still have a relatively light to medium flow but she was able to wear one pair for several hours without issue.

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  • AP
    Amanda P.
    Verified Buyer
    What size of underwear do you typically wear? M
    What size in Period. did you purchase? M
    What do you use your Period. products for? Primary Period Protection
    Rated 3 out of 5 stars
    3 days ago
    Absorbs blood only, doesn't feel dry

    This underwear is okay. It does a so-so job at absorbing. It does a decent job of sucking up the blood, but everything else (endometrial tissue and vaginal secretions, specifically mucus) will just sit there.

    I ended up changing underwear three times on my first day, and I DON’T have a heavy flow. Even if I didn’t have non-blood discharge, this underwear doesn’t do a good job of staying dry. It’s not dripping wet, but it feels damp and clammy, which just isn’t comfortable.

    All in all, I can only think of two things this underwear has over standard cotton pads: 1) Less trash, and 2) it stays put (unlike pads, which frequently shift).

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