Guideline Eyegear Swell Sunglass, Matte Black Frame, Spring Copper (Flash Silver Mirror) Polarized Lens, Large Grilamid BTR bio based polymer frame, fully recyclable Durable, premium comfort - 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 blue light, which boosts contrast and heightens visual acuity