The CAN-AM Flint Photochromatic goggle features an injected PC lens which is anti-scratch, anti-fog and distortion-free optics. Sizing & Fit Thermoformed 3-layer face foam for an optimal fit. Non-slip silicone strap keeps goggles in place. Safety & Visibility Removable nose guard for added deflection against debris. Lens & Optical Specifications Injection-molded cylindrical PC lens provides distortion-free vision and enhanced impact resistance. Lens VLT from 80% to 28%, with anti-scratch and anti-fog performance and a mirrored coating. Compatibility & Included Items Compatibility with prescription glasses cannot be guaranteed; it depends on the size of the lenses and frame.