Glare is reflected light that travels on a horizontal plane. Virtually any surface can be a source of glare, including water, sand, pavement, ice and snow. The lenses in the Native Gonzo Polarized Sunglasses incorporate a polarized filter, which absorbs the horizontal light, thus eliminating the glare. You're left with sharp, crisp, glare-free vision with increased contrast and depth perception.Fits large to extra large faces. Polarized lenses eliminate glare. Crystal carbonate lenses are impact resistant and block 100% harmful UV (ABC). Rhyno-Tuff? air frames weigh less than 1 oz. Venting above lenses to prevent fogging. Cushinol? nose pads for a comfortable secure fit. Cam action hinges. Mastoid temple grip. Anti-ocular intrusion system for impact protection. Soft case included.