Strap on a pair of numero uno goggles. The lens of the Giro Manifest Goggles ($120 - $200) is a breeze to swap out to suit changing mountain conditions thanks to Giro's patent-pending Pop Top lens change system. The Giro Manifest features a full size frame for a better fit and field of vision, an articulated outrigger for a helmet-compatible fit, a 12mm dual-density face foam, and an adjustable strap. The icing on the cake comes in the form of two spherical lenses that accommodate for low, medium, and bright light conditions. [source]