The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows
The Bikini Period. in Organic Cotton For Heavy Flows

The Bikini Period. in Organic Cotton For Heavy Flows

4.3
Rated 4.3 out of 5 stars
975 Reviews
$12.00
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Buy 6+ Save 10%, Buy 9+ Save 15%

1 pair absorbs 9 tampons of flow

Super absorbent, sleek style made for heavy days. 

Absorbs 9 tampons worth of flow or five pads. 

Yup. I’m for those days when your period has your foot down on the flow pedal. I have a little less fabric than the high-waisted, but with the same four-layer towel system I have just as much absorbency. My padding is designed to take whatever the flow throws, while making you feel extra secure and safe. Oh, did I also mention how cozy and comfy I am? Anything a tampon or pad can do, I can do so much better. 

When to wear:  On your heaviest days. Also great for postpartum and perimenopause.

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

Body: 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 9 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 an Octopus: Hi. I wanted to send you a personal message of gratitude for being conscious enough to stop using disposable products. Imagine me now, shaking your hand eight times. That’s what I’m doing. And sending you good energy with my two hearts. Tampons and pads take generations to biodegrade, cause endless pollution and they are frankly stupid inventions - and I should know what stupid is because I have eight brains. Be proud of yourself - you’re making a big change. 

4.3
Rated 4.3 out of 5 stars
Based on 975 reviews
Total 5 star reviews: 570 Total 4 star reviews: 208 Total 3 star reviews: 132 Total 2 star reviews: 56 Total 1 star reviews: 9
80%would recommend this product
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975 reviews
  • SA
    Sarah A.
    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? Period Backup
    Rated 4 out of 5 stars
    3 days ago
    Don’t wait! Just try them

    I am so glad I got these! I like the fit of the bikini better than the high waisted pair I purchased at the same time. I use these as a backup to a menstrual cup and loved not worrying about pads and extra waste. The biggest challenge as a new user will be figuring out how many pairs to have on hand as they take a long time to air dry in my midwestern environment. Love being able to purchase with HSA funds too!

    Was this helpful?
  • NB
    Nijah B.
    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? Period Backup, Primary Period Protection, Overnight Protection
    Rated 5 out of 5 stars
    2 weeks ago
    I like them

    As someone who used to wear Always size 5 overnight pads and usually used about 3-4 of those pads a day for flow reference. These last me 3-4 hours till they get uncomfy to pull back up after using the bathroom. They are very comfortable and good for if I wanna wear fitting jeans on my period. I generally pair these with pads which I've started using the reusable ones from here (also 3-4 hours of comfortable use for me) and I feel super secure, never a leak with these.

    Was this helpful?
  • KW
    kelli w.
    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, Period Backup, Overnight Protection
    Rated 5 out of 5 stars
    1 month ago
    Comfortable

    My daughters love how these feel.

    Was this helpful?
  • MS
    Megan S.
    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 , During Exercise
    Rated 5 out of 5 stars
    1 month ago
    Good fit and protection

    I like these and I’ve had no issues with leaks!

    Was this helpful?
  • B
    Brittany
    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? Overnight Protection , Primary Period Protection
    Rated 3 out of 5 stars
    1 month ago
    A little disappointed

    I’ve had these undies for about a year and a half now. I don’t know if the material is starting to bunch/shrink but I’m having way more leakage than I remember having when I first purchased them.

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