Leakproof Cotton Bikini
Mix & Match: Buy 3+ Save 10%, Buy 6+ Save 20%
Leakproof Cotton Bikini
Mix & Match: Buy 3+ Save 10%, Buy 6+ Save 20%
• Great for daytime protection, the ultra-thin liner absorbs about the same as 3 super tampons or 1.5 regular pads worth of liquid.
• The innovative floating gusset provides leak protection from every angle.
• The cotton-spandex blend feels luxurious against your skin.
• OEKTO-TEX® Class 1 Certified.
• Machine washable just like regular underwear.
Get the protection you want from periods and light bladder leaks while feeling comfortable and worry-free.
🇺🇸 Free standard shipping over $100*.
Free expedited shipping over $150*. Duty-free. (after discounts, before shipping + taxes)
Within 30 days of delivery, you may exchange for another size, style or store credit. We’re unable to provide refunds on underwear.
- JuliaVerified Buyer3 minutes agoRated 5 out of 5 starsReally good
I tried knix a while ago when they first launched, and I just didn't like the feeling on my skin and I just overall felt unconfortable at work thinking I'd have to change my whole underwear, what to do with it coming out of a shared bathroom, etc.
But I feel like they have been updated, as this time around I feel really good in these. I don't think I can ever go back to pads/tampons.
Was this helpful? - Elizabeth B.Verified Buyer6 days agoRated 5 out of 5 starsAmazing
These are the best of all the ones I’ve bought
Side to side coverage. I don’t leak over the sides.
Super absorbent and breathable.
Was this helpful? - Carol K.Verified Buyer1 week agoRated 5 out of 5 starsCotton bikini etc
So far I like them. They wash well. Very comfy. I haven’t tried the ultra thin French cuts yet but think they will be great too. I am loving the Vneck bras. Don’t even know I have them on. And what I like, in my size most bras have 4-5 hooks which I hate. These have 2, how fabulous proves you dont need a whole mess of them. Normally I dislike padding but these are so thin they do not change my shape.
I have been looking for new bras, after wearing the same brand/style forever but they no long have any colors to go under light color shirts. So I have moved on. And since I am old, the pantie lining can sometimes be a lifesaver. Thank you Knix.
Was this helpful?
How to wash
Machine Washable: Wash with like colors, cold setting with mild detergent, do not bleach, iron, or dry clean.
Always refer to our Fabric & Care section for best drying practices.
Your leakproof questions, answered.
Ultra
Extra heavy periods, overnight protection & light bladder leaks - absorbs about 13-17 tsp or 65-85 mL which is the equivalent of 7-9 super tampons’ worth.
Heavy
Heavy periods, overnight protection & light bladder leaks - absorbs about 6-11 tsp, 30-55 mL or the equivalent of 3-6 super tampons’ worth.
Medium
Medium periods, light bladder leaks & sweat - absorbs about 3-6 tsp, 15 -30 mL or the equivalent of 2-3 super tampons’ worth.
Light
Light periods, backup protection & sweat - absorbs about 1.5-3 tsp, 7.5-15 mL or the equivalent of 1-3 regular tampons’ worth.
Lightest
Lightest periods, spotting, sweat & discharge - absorbs about 1-1.5 tsp, 4-7.5 mL or the equivalent of 0.5-1 regular tampon worth.
Zero
Everyday wear with no leakproof protection - zero absorbency.
Absorbency | Good for | |
Ultra | Absorbs about 7-9 super tampons’ worth | Extra heavy periods, overnight protection & light bladder leaks |
Heavy | Absorbs about 3-6 super tampons’ worth | Heavy periods, overnight protection & light bladder leaks |
Medium | Absorbs about 2-3 super tampons’ worth | Medium periods, light bladder leaks & sweat |
Light | Absorbs about 1-3 regular tampons’ worth | Light periods, backup protection & sweat |
Lightest | Absorbs about 0.5-1 regular tampon worth | Lightest periods, spotting, sweat & discharge |
Zero | Zero absorbency | Everyday wear with no leakproof protection |
Our Leakproof Period Underwear features multi-layer technology that differs from style to style, but works to ensure you stay fresh, dry and protected. For example, in our Super Leakproof™ No-Show Bikini, the top layer wicks away moisture from your skin; the inner-layer absorbs the liquid and locks it in; and the outer layer keeps any liquid from spotting your clothes.
Depending on the size and style of underwear, the leakproof gusset ranges from around 7.5” to 9” long. Our Super Leakproof(TM) Underwear features a 25% bigger gusset, with more of the coverage in the front of the underwear. For overnight leakproof protection, our Super Leakproof(TM) Dream Short gusset ranges from 10” to 14” long.