End of Year Sale
Save on Period Undies, Swim, Active & More!
- Lucky Star/Berry/Cosmo
*Prices as marked for “Sale up to 60% off”.
Any products marked Sale will be final sale, no returns or exchanges. Offer valid from Wednesday, December 20th to Tuesday, January 2 at 11:59am PST. Applies only to in-stock items and cannot be extended after the listed date. No price adjustments for previous orders. No rain checks. Contact your local store for collection availability.
Knix store locations include: Santa Monica, San Diego, San Francisco.
Free Shipping available on orders over $70 USD + before tax and after discounts and applies to shipping addresses within the USA.
The short answer: nope! Depending on the absorbency level of your period underwear and the heaviness of your flow, you can wear our period undies on their own or as a backup to tampons or menstrual cups. You can wear our High and Super absorbency underwear alone and be totally protected, while our Medium absorbency underwear can be worn alone on lighter days or as backup on heavier days.
Super Absorbency
Absorbs 9–12 tsp (45–60 ml) of blood—that’s about 9–12 regular tampons or pads! Perfect for overnight protection or your heaviest days when changing into a fresh pair might not be convenient.
High Absorbency
Absorbs 4–8 tsp (20–40 ml) of blood, or the equivalent of 4–8 tampons or pads. These are perfect for heavy flow days.
Medium Absorbency
Absorbs up to 3 tsp (15 ml), or about 3 tampons or pads worth of blood. Ideal for light to medium flow days or as backup to tampons or period cups.
All of our period underwear, swimwear, reusable pads, and activewear have our patented leakproof technology built right in.
First Layer: Moisture-wicking, antibacterial technology wicks away sweat and moisture while neutralizing odors to keep you fresh all day long.
Second Layer: A super thin, highly absorbent liner that holds the power of 3–20 tampons or pads.
Third Layer: A secure, liquid-resistant outer layer keeps leaks from happening.
Underwear
Step 1: Give your underwear a quick rinse under cold water.
Step 2: Throw it in the washing machine with your regular clothes. Wash on cold with mild detergent (no softener or bleach).
Step 3: There are two ways to dry them depending on the undies you have: lay flat to dry for medium absorbency products, or tumble dry on low for high to super absorbency products.
Step 4: That’s it! No ironing needed.
Leakproof Tights & Leotards
Quickly rinse the gusset before you throw your tights or leotard in the machine. Wash on cold with mild detergent, then lay flat to dry. That's it!
Swimwear
Machine wash cold and lay flat to dry. Do not bleach, iron, or dry clean.
Check out our size chart here. If you want some help, we have virtual fitters ready on deck to help you find your perfect fit. Book a video call with them today.