The 360 Eyewear Raven sunglasses, constructed from 6061 aircraft-grade aluminum, offer a double-spring hinge assembly for extra strength and durability. The lenses, made of a 2-mil thick polycarbonate material, are ANSI Z87.1 rated for impact resistance and shatterproof protection. The lens coating offers 100-percent protection from all harmful UVA and UVB rays. The sunglasses are available in black and silver with the optional, patented "Diamond Plate" design and the lenses come in multiple color options. These sunglasses are built in the U.S.A.