The I/O was the original goggle to solve the problem of what to do when changing lenses and it remains the industry standard. 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. Comes with 2 interchangeable lenses.
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