Smith's been leading the way in the eyewear game for years, and has stepped up once again to deliver with the IO 7 interchangeable lens goggles. Taking the pioneering rimless design of the IO to the next level, the IO 7 uses a Single Pivot Quick Release lens change system to make switching out your lenses even simpler, while at the same time making the frame lighter and more comfortable. The dual axis outrigger system and three layer DriWix foam conform to your face without pinching, and the ultra wide silicone backed strap sticks to your helmet like gum to the bottom of your shoe. Smith also designed the IO 7 with an AirEvac system that interfaces with your helmet to help circulate air, reducing fogging on those sticky, swampy days. Of course, you can't talk Smith without bringing up top shelf optical quality, which the IO 7 delivers in spades. The spherical Carbonic X polycarbonate lens is designed using TLT optics, which mirror the shape of your eyes to provide precise, crystal clear vision in all conditions, and features a mess of fog preventing tech to keep you seeing clearly: the dual Vaporator lens technology is finished off with a Porex filter that sucks moisture from between the inner and outer layer, and is treated with a 5X anti fog coating to prevent moisture build up. You'd expect Smith to throw down the most precise, technologically advanced eyewear out there, and the IO 7 certainly doesn't disappoint.