Milspec Trans-Tec Tactical Optical System features an Anti-fog, anti-scratch interchangeable lenses, glasses come with a 2.2mm smokey grey polycarbonate lens with an extra interchangeable yellow lens and provide UV 400 Protection. The frame of the glasses features a removable temple, replacement elastic strap and foam backing for added comfort. In addition, Milspec Trans-Tec Tactical Optical System comes with microfiber storage and cleaning pouch.