Cycling and running without changing your eyewear.
 
Sportchromic photochromic lens in Nylon (NOT Polycarbonate) to quickly adapt to every light condition mantaining, like the whole X Series, an optical perfection even superior than the mineral glass. Accurate and steady thanks to the grip guaranteed by the adjustable nose pad, perfect fit for men and women.
 
They can be take prescription lens, thanks to the internal clip.