The new Vibram Arctic Grip All Terrain outsole with Vibram XS Trek Evo compound and New Traction Lug Technology provides advanced traction on all terrains including wet ice, snow, mixed/loose surfaces and hard pack; superior grip no matter the season. The Apex Pro is built for high endurance cool and cold weather pursuits or treks that require a more athletic and agile boot. 100% waterproof with strategically placed rubber overlays that provide additional protection along the shin and forefoot without adding unnecessary weight. 100% Waterproof, 100% MUCKPROOF Dual Density Footbed with Memory Foam for Long Lasting Comfort Pull Tab Provides Easy On/Off Breathable Air Mesh Lining Facilitates Air Circulation to Improve Comfort and Reduce Heat and Moisture Combining VibramA(R)&';s All-New Arctic Grip All Terrain with XS Trek Evo and their New Traction Lug Technology for Added Durability and Grip on Wet and Dry Surfaces, Improving Traction by up to 25% 4mm Neoprene Bootie for Comfort and All-Conditions Performance Lightweight EVA Midsole for All Day Comfort and Support bioDEWIX(TM) Dry Footbed Insert Topcover with NZYM(TM) for Odor Control and Moisture Management