Ryders Eyewear Swerve Pro Sunglasses, Gloss Black Frame With Brown Photochromatic Polarized Lens Polarized technology eliminates the distracting glare that comes from roads, trails Polarized-Photochromic, optically-correct, shatterproof, vented polycarbonate lenses with 100% UVA,UVB + UVC protection, made in France TR90 frame (extremely durable and flexible) Hydrophilic (anti-slip), hypoallergenic, temple tips and adjustable nose pads Protective zipper case and lens cleaning cloth included Water while the Photochromic feature of these lenses adjusts to the current light levels Getting lighter or darker depending upon the strength of UV you encounter