The KLIM Oculus Goggle is designed with one purpose in mind: to give you the best possible vision on the snow. This was accomplished by addressing the three main pain points of all goggles: changing light conditions, fogging and field of vision. The Oculus system with KLIM Slide-Lock technology allows you to quickly and easily change lenses in the field to deal with changing light conditions - essentially its like having [up to] three goggles with you in a very compact package. The Oculus is engineered with the latest anti-fogging technologies such as unparalleled air circulation, massive internal air volume and the KLIM CLEAR anti-fog technology. The spherical, optically correct lens design provides unprecedented peripheral vision and clarity. 2nd lens colorway that is included with each Oculus Goggle *Excludes the photochromitic lenses.