Guideline Eyegear Keel Sunglass, Matte Black Frame, Spring Copper Flash (Silver Mirror) Polarized Lens, Large/X-Large Grilamid BTR bio based polymer frame, fully recyclable features wide sloped temples, rubber brow and nose pads - dark gunmetal accents High coverage factor ideal for slope to surf wearers - includes Neoprene case with Velcro closure Polarized Polycarbonate Lens 100% UVA/UVB Protection Silver Flash Mirror lens appears silver and is paired with tints of copper, brown or gray depending on style; VLT 12.85% The tint and mirror combination absorbs a high degree of light, which boosts contrast and heightens visual acuity