This is a factory original Smith I/O goggle replacement lens. Replace your scratched or cracked lens with this replacement, or upgrade to the Chromapop lens technology. Fits Smith Goggle I/O Spherical carbonic-x lens. 5X anti-fog inner lens. TLT lens technology for crystal clear vision. Patented Vaporator seal and Porex filter permanently bonds two lenses together, allowing the lens to breathe while preventing moisture entry.