The new Vibram Arctic Grip All Terrain outsole with Vibram XS Trek Evo compound provides advanced traction on all terrains including wet ice, snow, mixed/loose surfaces and hard pack; superior grip no matter the season. The winter can be unpredictable, but your footwear shouldn&';t be. That is why we&';ve developed the Arctic Ice Mid with Arctic Grip. These winter high-performance sport boots step up the warmth factor with 8mm neoprene inner boot layered with cozy fleece lining for ultimate warmth in extreme conditions. The stretch-fit top-line binding keeps the boots snug to your legs to keep cold air out and warm air in. 100% Waterproof, 100% MUCKPROOF 8mm Neoprene Bootie for Comfort and Performance bioDEWIX(TM) Anti-Microbial Footbed Insert Topcover with NZYM(TM) for Odor Control and Moisture Management Extended Rubber Coverage Fleece lining for warmth Lightweight Midsole for All Day Comfort and Support Pull tab for easy on/off Vibram Arctic Grip A.T for Wet Ice Traction Coupled with XS Trek Evo Adding Durability and Improved Grip on Wet and Dry Surfaces