Occhiali Fotocromatici Transizione Outdoor Bicicletta Occhiali da Sole UV400 Ciclismo
Photochromic PC lens with multilayer coating. The photochromic lens the color automatically changes from light to dark in respose to the UV. The best photochromic effect is in the temperature range of 10℃ (50℉) to 23℃ (73.4℉).