The North Face Men's Ultra Extreme II GTX Hiking Boot's winter ready features keep your feet warm and dry on icy treks, and lightweight construction helps you go the distance. The tough, water resistant upper is backed up by a Gore Tex membrane for the ultimate combination of waterproofing and breathability. Lightweight and low profile Duratherm insulation helps your feet stay toasty when you're hiking through the snow, and the rugged Vibram Icetrek outsole helps you maintain your footing on icy surfaces. Pebax Cradle technology offers excellent energy return for a springy feel and maximum stride efficiency, and it enhances stability to keep you from rolling an ankle on uneven terrain. A full length Pebax Snake Plate enhances rigidity and prevents stone bruising on rocky ground.