Building upon the success of a rimless goggle, Smith has introduced the I/OS, essentially the little sister to the bigger I/O. The impetus behind the I/OS was to bring the quick lens changing system to a broader audience, so that folks with smaller faces can stunt around the hill as well. In addition to the easy-as-pie lens changing, the I/OS also features Smith’s Vaporator anti-fog system, dual-layer face foam and a stock of spherical lens tints. If you’re not into the idea of looking like a space alien with a goggle that’s too large for your face, but still value a quality goggle experience, then the I/OS is perfect for you.