I just used my XCR 103s for elk hunting in the Washington Cascade Mountains after my Danner boots shredded my heels. No joke: a three-mile round trip across uneven terrain; up and down 800 vertical feet of scree and switchback; soaked 'em in a creek on the way up in 25 degree weather . . . they performed with amazing efficiency. I never got to test them with meat on my back, though!