Smith "FACTOR MAX" Model Sunglasses

The FACTOR Max's Polarized interchangeable lens system creates a sleek and subtle design allowing unobstructed peripheral view perfect for the running trail, golf course, or weekend ride. Smith's Interchangeable lens system utilizes distortion-free, 9 base lenses to provide precise optical clarity and maximize coverage while minimizing peripheral exposure to sun, wind, and glare.

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Smith's polarized lenses are constructed of a sheet of polyvinyl alcohol film (PVA) sandwiched between two pieces of lens, thus eliminating glare. Cheap polarized lenses do not use PVA material and can cause distortion in your vision, which may eventually lead to headaches.