100% UV400 protection coating, blocks 100% harmful UVA & UVB Rays. Restore true color, eliminate reflected light and scattered light，make the scenery more clear and soft and protect eyes perfectly. CLEAR, SUPERLIGHT, STYLISH AND DURABLE- Cool Rimless jacket frame design enables clear lower vision field. Lightweight design is ideal for motorcycle and cycling bicycle, driving, running, fishing, racing, skiing, climbing, trekking or other outdoor activities. Fashion and stylish design, with rich color combinations of frames and lens. Polycarbonate lens and frames are impact, scratch resistant, durable and unbreakable. Material: PC (Lens), pmct (Frame) Include:1 glasses case & 1 glasses bag 1 glasses cloth 1 Glasses Frame 1 glasses rope 1 polarized testing sheet 1 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.