Guideline Eyegear Alpine Sunglass, Green Tortoise Frame, Freestone Brown Polarized Lens, Large Grilamid BTR bio based polymer frame, fully recyclable has tremendous eye coverage and sleek look with no-slip nose and temple pads High polarized protection for slopes or seas - includes Neoprene case with Velcro closure Polarized Polycarbonate Lens 100% UVA/UVB Protection Freestone Brown Lens tint transmits a wide spectrum of colors for truer color perception and high contrast; VLT 12.4% Performs optimally in lower light conditions and perfect choice for shallow water conditions; Great driving sunglass