Smith's Chamber Tactical sunglasses supply outstanding optical quality and show-stopping good looks. They also offer superb protection with their high-impact lenses that meet military standards. These great shades are made from Smith's environmentally-friendly Evolve material so you can look great and feel great about it, too. Hydrophilic pads on the nose and temples keep these shades from slipping, even when wet. And Smith's Techlite Polarized Glass TLT lenses offer amazing optical quality and incredible weight savings, plus a water-shedding, anti-reflective coating.