These kumacross 20 sunglasses withstand an active lifestyle thanks to robust materials and high quality lenses the ultra light frames feature quick release temples that pop apart on impact rather than breakinggreyred mirrorpreserves natural colors with cooling effectlens description protects in medium to bright light conditions grey lenses preserve natural colors and protect with a cooling effect in bright light conditionsrecommended use darkly tinted greyblue mirrorpreserves natural