The I/O's intuitive quick release lens change system is tried and true, so you can switch lenses and stay out in the most demanding conditions. The spherical lens has 5X™ anti-fog, Smith's highest level of anti-fog technology, and TLT Optics for crystal clear vision. The I/O was the original goggle to solve the problem of what to do when changing light and weather demanded different lenses.
Features : • Quick release lens change system • Includes bright light and low light performance mirror lenses • Spherical carbonic-x lens • 5X™ anti-fog inner lens • TLT lens technology for crystal clear vision • Patented Porex™ filter prevents optical distortion during changes in elevation • Medium fit • QuickFit strap adjustment system with clip buckle • 3-layer DriWix face foam • Helmet compatible • Ultra-wide, silicone backed strap • Dual-axis outrigger position system • Includes microfiber goggle bag with replacement lens sleeve