Smith I/O MAG S Goggles are just the shrunken down size of the killer Smith I/O MAG Goggles. The magnetic system allows for a super easy lens change system, it's all magnetic so you can just pop them in and out; until now Anon was the only brand to use this kind of system effectively but these goggles swap just as easily. In terms of the goggles themselves, they're based on Smith's classic I/O lineup, which is widely regarded as the best goggle technology in the ski world right now. This goggle includes bright light and low light ChromaPop™ performance lenses. Each lens is spherical and utilizes 5X™ anti-fog inner lens technology coupled with TLT lens technology for crystal clear vision. Combine the best goggles with the easiest lens change system, and a fit specifically designed for a smaller face and you've got yourself something pretty killer.