Equipped with the largest spherical lens possible, the I/OX is the biggest, baddest goggle in the I/O family. 5X Anti-fog technology, unparalleled peripheral vision, easy interchangeability, and perfect helmet integration.Medium/Large FitQuick Release Lens SystemSpherical, Carbonic-X Lens with TLT OpticsPatented Vaporator Lens Technology with Porex? Filter5X Anti-Fog Inner LensFloating Foam Membrane Eliminates Eyeglass Temple PressureIncludes Two Performance Mirror LensesUltra-Wide, Silicone Backed StrapQuickFit Strap Adjustment System with Clip Buckle3-Layer, DriWix Face FoamHelmet CompatibleIncludes Microfiber Goggle Bag with Replacement Lens Sleeve