Thanks, that's pretty interesting. Seems they recommend bringing 12 bottles at 2.6kg for about 70 pounds of just oxygen tanks total for the whole climb, and 5 o

Thanks, that's pretty interesting. Seems they recommend bringing 12 bottles at 2.6kg for about 70 pounds of just oxygen tanks total for the whole climb, and 5 on the actual summit attempt, for ~30 pounds. That's already a lot of weight before you get to all of the clothes, food, water, climbing gear, and other supplies.