The KLIMOculus Goggle is designed with one purpose in mind: to give you the best possible vision on the snow. This was accomplished by addressing the three main pain points of all goggles: changing light conditions, fogging and field of vision. The Oculus system with KLIMSlide-Lock technology allows you to quickly and easily change lenses in the field to deal with changing light conditions - essentially it's like having [up to] three goggles with you in a very compact package. The Oculus is engineered with the latest anti-fogging technologies such as unparalleled air circulation, massive internal air volume and the KLIMCLEAR anti-fog technology. The spherical, optically correct lens design provides unprecedented peripheral vision and clarity.FEATURES Optics/Lenses Quickly/Easily Change Lenses In The Field With KlimSlide-Lock Technology 1 High Light Dual-Pane Lens Included 1 Low Light Dual-Pane Lens Included Optically Correct Spherical High Visibility Design Durable, Scratch Resistant Poly Carbonate Outer Lens Cellulose Inner Lens Combats Fog And Moisture KlimFov+ Geometry: Peripheral Vision Is Unmatched KlimClear Anti-Fog Technology Rigid, Compact, Packable Heat-Formed Lens Case For Two Spare Lenses Clear Lens Upgrade Recommended [Not Included] For Very Low Light/Dark Situations Ventilation Entire Ventilation System Designed To Minimize Fogging & Maximize Vision Maximum Internal Air Volume KlimA.F.I. [Air Forced Induction] Technology Maximizes Airflow In-Frame Directional Intakes Massive Lower And Upper Frame Vents 188% More Frame Vent Area Than Current Competitor 123% More Eye Cavity Volume Than Current Competitor Snow-Dust Resistant Frame Foam Fit/Finish Outriggers Provide Premium Fit And Seal Oversized 46Mm Non-Slip Silicone Strap Over Sized, Breathable Triple-Layer Face Foam Triple Layer, Highly Ventilated Face Foam To Wick Moisture And Maximize Comfort Compatible With All Motocross Style Helmets Fits Perfectly In KlimHelmets Extras 2 Lenses Included (Low And High Light Lenses) Premium Goggle & Lens Bag / Cleaning Cloth Rigid, Compact, Packable Heat-Formed Lens Case Holds Two Spare Lenses