Vision Cylindrical Carbonic-x lens for clarity and impact resistance with built-in Airflow technology for active ventilation Fog-X anti-fog inner lens for fog-free performance Fits over the glasses (OTG ) and is compatible with our optical docking system (ODS) prescription lens insert Fit / Integration Designed for ultimate integration with Smith helmets for maximum comfort, venting and fog-free performance Patented regulator adjustable lens ventilation helps eliminate moisture QuickFit strap adjustment system lets you find the right fit fast Two-layer DriWix face foam wicks moisture for a fog-free fit Floating foam membrane eliminates eyeglass temple pressure Ergonomic Outrigger Positioning System improves fit and comfort for fog-free performance when wearing a helmet Large fit; Available in Asia fit Includes Microfiber goggle bag