Henry T.wrote a review of Smith I/O Interchangeable Optics Spherical Series Goggles on February 7, 2010
Peripheral range is second to none. Color schemes to match any kit. Optics is on par with the "O". But, and there is always a but, these bad-boys will fog during those 31 degree pow-days. The I/O's, like any goggles will fog up faster than a fart in a one-piece if you are prone to the sweatstacio like I am. If that is case, go turbo. Smith prodigy turbo.