Black Flys Men's Hangover Fly Sunglasses 8 Base Injected Frame/8 Base Polycarb Lenses 8 Base Injected Frame/8 Base Polycarb Lenses frame 8 Base Injected Frame/8 Base Polycarb Lenses lens non-polarized Lens width: 1 millimeters 100% UV Protection 8 Base Polycarbonate Lenses 8 Base Injected Frame Comes with Black Flys zip case and microfiber soft bag Black Flys nylon frames are constructed around a wire core, keeping the shape consistent in extreme conditions.