Ryders Eyewear KIRA Women's Cycling Sunglasses with Grey Photochromic Tint Changing Lenses, Black High quality cycling glasses with polycarbonate lenses that block 100% of harmful UVA, UVB & UVC light Frames are TR90 thermoplastic for durability, flexibility, and lightness Hydrophilic anti-slip nose pads, a material so effective it grips better when wet Photochromic lens changes tint as lighting conditions change, perfect for Variable trail conditions while mountain biking Medium fit, 76-27% vlt