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Athletic Leak Proof Thong - FitKnix

Athletic apparel has evolved, it’s time your underwear did too. Finally, underwear that works as hard as your workout. Made with high performing moisture-wicking LYCRA® freshFX® fabric. These seamless panties are designed to maximize movement and comfort, while providing built-in, leak resistant, moisture-wicking, and odor eradicating technology that keeps you fresh, dry and panty-line free.


-Made with high performance moisture wicking LYCRA freshFX fabric. 

-Seamless design (no visible panty lines) is invisible under tight work out clothes. 

-Leak proof gusset with moisture lock. 

-Built in panty liner absorbs 1-3 tsp of moisture. 

-Moisture wicking cotton gusset keeps you feeling dry. 

-Anti - Microbial Technology combats odor. 

-Perfect for Yoga, CrossFit, Equestrian, Running, and Fitness. 


Thong Fit: A less is more look with a revealing rear that's there where it counts.

Body: 77% lycra, 23% Spandex. Gusset: 100% cotton

Care instructions: Machine wash cold with mild detergent, do not bleach, and lay flat to dry. 


*Flat rate shipping to US and Canada. Wel also ship to select countries worldwide.


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Product Reviews

  1. the only daily-wear panties i will ever buy

    Posted by Unknown on 4th Jun 2014

    As far as daily wear/gym wear underwear is concerned, I have until this point been extremely disappointed with panty-line, muffin top, bulky gusset, off-sizing, etc...

    Fitknix has solved all this!! I have both the "air" and "regular" versions and both fit perfectly and feel light against my skin. Buying them for all my friends now!!

  2. Perfect for the gym!

    Posted by Jane on 31st May 2014

    I find the design of this undergarment so comfortable. The waist is low enough that there's nothing rolling down. The cut is athletic, yet pretty. The overall feel is smooth, totally weightless, and they dry almost instantly after washing.

  3. Awesome!

    Posted by Unknown on 11th Sep 2013

    Really enjoyed these for working out. Thank you thank you for these.