Bobster Eyewear Tread Sunglasses Bobster Eyewear Tread Sunglasses have an impact resistant polycarbonate lenses. with 100 UB protection. Features: Smoked lens Impact resistant polycarbonate lenses Polycarbonate matte black frame Anti-fog lenses Removable closed cell foam Accept prescription lenses (not included) Ansi Z87.1-2010+ approved Meet CE standards Includes a carry case and cleaning cloth