The kumacross halfrim sunglasses withstand an active lifestyle thanks to robust materials and high quality lenses these ultra light frames provide a comfortable fit to your active lifestylefeaturesspx flex zonesvision advantage with lst lens concept this lens is extra light and withholds strong impact forcesdouble snap nose padspreserves natural colors with cooling effectlens description protects in medium to bright light conditions grey lenses preserve natural colors and protect with a