This pack is the best! My first test of this pack was a summit of mount Yale, a 14er in Colorado, via its east ridge, a route not for the faint of heart, with it loaded up to 40 pounds in 45 mph winds and -20 degrees. I was cutting through trees off trail and dragging it on rocks on the ridge and it stood up just fine. I have summited six other 14ers this winter with this pack, I have taken it to the baking canyons of Fruita and Moab, I have taken it kayaking down the Colorado River and just about everything in between. It been my go to for hiking, rock climbing, ice climbing, mountain biking and kayaking. I have had it loaded up to 70 pounds in its 55L configuration and hiked 20 miles with 5k elevation gain every day for a week straight and it has withstood it all and doesnt appear to be phased by my abuse. This one is a keeper. I sold my arcteryx pack because this one outperforms it in every way. Eddie Bauer has really stepped it up with their first ascent line, and this pack is a prime example of that.