Just my opinion based off of a lot of climbing, hiking, and hunting in the mountains. You are wasting your money, pack space, and adding unnecessary weight. If you have problems functioning at 10K you really need to be working on your fitness.
There aren't any problems functioning anywhere.
I'm trying to find a way to put the hikin in, while acclimatizing, part easier.
Like the oxygen masks they have at football games. Player gets gassed, hits the O2 on the sideline, ready ta go.
Was thinkin of tryin ta lose weight, but I didn't wanna get caught up in onea those "eat less and exercise" scams.
