Tmbr. Men's Midwest Wood Rectangular 51mm Polarized Sunglasses resin frame plastic lens polarized Lens width: 51 millimeters Bridge: 15 millimeters Arm: 141 millimeters Sometimes you need just a little more "flex" in your sunglasses and that is why every pair of Tmbr. sunglasses come with Stainless Steel Flex Hinges to give you the little extra room you might need so your sunglasses can sit comfortably on your face. All Tmbr. wood sunglasses are 100% UVA/UVB protective and are polarized to help protect your eyes from the sun's harmful rays, and reduce glare off water or pavement. Made from a unique blend of sustainable wood and eco-friendly acetate which allows for durability without sacrificing style. Each pair of Midwest wood sunglasses is treated and fitted with a wire backbone for increased strengths in the legs and the overall frame. Made from real rosewood