Gasket, hingeless Aluminum, Matte Black Powder Coated Frame, 100% UV Polycarbonate Smoke Gray tinted Lens, 13% Light Transmission, reduces the most amount of sunlight. and allows true color perception. Best use, bright sunny days, driving, skydiving, motorcycle riding, tactical, combat, and casual wear. Comes with a microfiber cleaning sock, 1 Year manufactures warranty. Designed and Built in the USA. Liquid Aluminum Sunglasses can be adjusted to fit any face. This hingless model frame was designed to be formed by bending at the temple ends. The frame was specifically manufactured without standard hinges, allowing for the ultimate fit and quality. Thus creating a frame that will last you a lifetime, without losing fit.