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 Wazee 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 medium to 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. Folding plate technology. Anti ocular intrusion system for impact protection. Soft case included.