The Bikini Period. in Sporty Stretch For Heavy Flows

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.

• ⚘ Organic Cotton

Machine washable. Cold wash, hang dry recommended. Designed to be durable and effective for multiple years.

The Period Company is a Vision Driven brand from Los Angeles, CA. The Period Company combines certified organic materials with a low-waste production process. Products are designed to last, reducing single-use waste dramatically. Their minimal packaging is also thoughtfully made. Their mission and product design prioritize sustainability at every turn — from textile selection to social impact.

Size Chart

We want everyone to find the right fit — our sizing is designed to be inclusive and comfortable.

Size	US Pant Size	Waist (in)	Hip (in)
XS	0–2	24–26	34–36
S	4–6	26–28	36–38
M	8–10	28–30	38–40
L	12–14	30–32	40–42
XL	16–18	32–34	42–44
2X	20–22	34–36	44–46
3X	24–26	36–38	46–48
4X	28–30	38–40	48–50
5X	32–34	40–42	50–52
6X	36–38	42–44	52–54

How to Wear Period.

What's my flow threshold?

Everyone periods differently. When you try your first pair of Period, you’ll need to figure out how many hours they can last for on a heavy day. That’s your flow threshold. You know how you just know with a tampon and pad? And how intuitive it is when you need to change? Well, the same thing goes with Period underwear. On that first try, check in on your underwear every hour or so and see how they’re doing. You’ll know when you’ve hit that threshold, then just remember that time, so you can build your Period plan around it.

How many pairs should I buy?

How many pairs you need per period is decided by two things: do you want to wash any pairs during your period and reuse them? And what’s your flow threshold?

Just to give you an idea (but remember everyone periods differently):

• We tend to use 3–4 Heavy Period pairs for Day 1, and the same for Day 2.
• For Days 3–6, we typically wear one pair of Light Period a day.
• If you don’t want to wash and reuse pairs, that’s around 8 Heavy + 4 Light pairs.
• If you do plan to wash and reuse, you can cut that down by half (4 Heavy + 2 Light).

Still have questions? Reach out — we’re here to help you period better.

🚛 This product is fulfilled by The Period Company.

We offer free shipping on US orders over $40.  Some of our products are available internationally, please note that duties may apply and they are not included. 

All orders are processed within two business days of purchase.

Once shipped, estimated delivery times are:

• 3–8 business days for items from U.S. brands.
• 5–14 business days for pre-orders, if the item is available.