GUNNAR Optiks PPK Gaming Glasses have the only doctor recommended, patented lens technology designed to improve visual performance and reduce eye strain for those with 20/20 or 20/20 corrected vision. Made of high tensile steel with a gloss onyx finish, the PPK has a full rim frame and fastener free hinge design for incredible durability, style and comfort. Flexible temples (arms) provide retention to keep eye glasses in place and ergonomically fit a wide range of face shapes while distributing headphone pressure to ensure headset compatibility. The PPK is a medium fit frame ideal for a wide range of faces. Single-piece front construction eliminates welds, screws and potential points of discomfort. Interchangeable temple sockets create endless design options and adjustable silicon nose pads allow for a optimal fit. The PPK has a 57-millimeter lens width, 20-millimeter bridge width and 130-millimeter temple length.