What you get This light and simple Mammut pack is cavernous for its weight thanks to an expandable roll-top closure. Load it to the gills with a rope and gear for alpine missions, then strip it down for summit attempts without having the pack get floppy (the hipbelt padding, metal frame strut, and toplid are removable). Limitation: The wire-frame backpanel maxes out at around 35 pounds.
Trail cred “I’ve taken it through the Alps, Scotland, New Hampshire (for ice climbing), and Southeast Asia,” says tester Joel Nyquist. “It swallows three days’ worth of mountaineering gear and the waterproofing can handle a monsoon.”