No map required. On the bike, in the car or on a hike, the lightweight Detour shield finds the way in all activities. Medium size with face loving megol nose pads and temple tip inserts, the lightweight TR90 frame features glare reducing polarized polycarbonate lenses that provide 100% protection from harmful UV rays. Polarization Through advanced lens technology, Suncloud polarized lenses selectively filter horizontally reflected, visually interfering light waves know as 'glare'. The elimination of direct and ambient glare results in superior visual clarity, definition, color transmissions and optical comfort. Injection Molded Lenses Each Suncloud polarized lens is manufactured with optical grade Polycarbonate using an injection molding process to ensure exceptional clarity and associated optical properties. This process helps to create a rigid polarizing film carrier and eliminates distortion. 8 Base Frame Curve Suncloud frames and lenses feature 8 base curvatures, enabling the frame and lenses to wrap on the wearer's face. 8 base frames provide added protection from annoying side glare and environmental elements such as wind, dust and particulate matter. Grilamid Nylon Frames Suncloud injection molded frames are crafted from optical grade Grilamid TR-90 Nylon for a quality fit, flexibility and lasting durability in all environmental conditions.