Zachary Friedley (he/him) is a professional runner sponsored by On. Zach—who is missing his right knee—runs with a prosthetic knee and blade. He has raced with the UTMB World Series, finishing some of the most prestigious mountain races globally. Zach is also the founder of Born to Adapt, a nonprofit project that activates outdoor trail events and inclusive run clinics for the disabled community worldwide. Zach continues to work with race organizations internationally to make trail running more inclusive.