If youve never heard of the Smith I/O MAG goggles, consider this your introduction to arguably the most popular goggle in the ski and snowboard world. The Smith I/O MAG features a user-friendly magnet lens changing system that stays in place and is perfect for rapid changes, while a 5x Anti-Fog Inner Lens keeps your lenses free from nasty fogging. Spherical ChromaPop lenses separate colors for added clarity and definition and an Ultra-Wide Silicone Backed Strap keeps your goggles from sliding around on your helmet. Includes 2 lenses, one for each for high and low light conditions, and a GoggleSoc lens protector. Medium Fit