Polarized Cycling Sun Glasses Outdoor Sports Bicycle Glasses Men Women Bike Sunglasses Protection Ey
Material: PC (Lens), pmct (Frame)Include:1 glasses case & 1 glasses bag1 glasses cloth1 Glasses Frame 1 glasses rope1 polarized testing sheet1 lens(Polarized Photochromic Lens) Polarized Photochromic Lens.The rate of discoloration is related to the intensity of ultraviolet light and the temperature.(if UV intensity and temperature is low, The speed of discoloration will become slower）The glasses lens original color is gray , so when it's change color , If light is not strong, then the reaction is not so obvious. If the glasses lens initial color is transparent lens , then the reaction is obvious.