Birdz Eyewear Dirty Bird Goggles Birdz Dirty Bird rugged goggles, great for motocross, BMX, ATV, etc. with interchangeable lens kit, that will fit over most prescription eyeglasses.Lenses: Anti-Fog coating; shatterproof polycarbonate; rated UV400 to block out the harmful ultraviolet light; clear and smoke interchangeable lenses Frame: Black; upper and lower venting system to maximize air circulation inside the goggles which helps prevent sweat condensation and fogging. Comfortable soft foam padding on the inside of the frames. Helmet-compatible with a SILICONE LINED ELASTIC HEADSTRAP for non-slip gripping on helmets. Pouch: Comes with a micro-fiber storage bag. Removing the Lenses: Hold the bottom center of the frame (by the nose area) and pull the upper side of the frame. The top portion of the lens will pop out. Hold the top center of the lens and pull out. Inserting the Lenses: Hold the bottom center of the frame (by the nose area) and align the bottom of the lens to the grooves of the bottom center of the frame. Press the lens into the grooves of the frame. Align the right and left sides of the lens to the grooves of the frame. Pull the top portion of the frame upward and align the lens into the groove of the frame. Push down on the frame. Press firmly on all sides of the frame to make sure that the lens is placed tightly in the frame. | 
