Every hiker or ski mountaineer has become snow blind at some point in their life. Then the next time you go out you bring your regular sunglasses and realized that even the most expensive pairs of everyday sunglasses just don't get the job done in the mountains. They fall down your nose. They fall off your face completely into a crevasse. They let in too much light from the periphery.
Lets get some nice Julbo Vermont Classic spectrum 3 sunglasses the original sunglasses for mountaineers sense the late 1800s on mass drop!