Altra Men's Olympus 5 Hike Mid GTX Black GreySet out on any hiking adventure in the Olympus 5 Hike Mid GTX, with waterproof GORE TEX product technology, which is guaranteed by GORE TEX to keep you protected from the elements. According to Vibram, a grippy Vibram Megagrip outsole gives you unparalleled grip on wet or dry surfaces. Our Original FootShape Fit gives your feet room to spread out and move naturally and a mid cut design gives your ankles added support so you can stay out there longer