Ed Viesturs talks about using o’s on the ascent
There have lots of comments on seeing Ed Viesturs with an oxygen mask on while he summited. He is of course famous for climbing all 14 8000er’s without supplemental oxygen. You can see photos, great ones, over on the Firstacsent blog. But he is also famous for being cautious and a thinking man’s mountaineer. Ed explains why he decided to use O’s on his way up from the south summit in the latest Firstascent video. Sure makes good sense, given the cold and the crowds, although I doubt anyone would even question it.