The Scarpa Men's Hydrogen Hike GTX Boot is just as comfy hiking on snowy trails as it is hiking under a warm, sunny sky. Its Gore-Tex Surround membrane is one of the few--if not the only--that offers 360-degree waterproofing. Most waterproof membranes only cover the upper with waterproof, breathable protection, but Gore-Tex Surround integrates waterproofing under the foot without inhibiting breathability by integrating mesh inserts through the sole. The result is a boot that's as big on waterproofing as it is breathable so you can hike in winter snow as comfortably as you can in summer's heat. A boot this innovative deserves equal innovation underfoot, so Scarpa hooked the Hydrogen up with a Vibram XS-Trek sole that ensures stability and traction regardless of the terrain.