Muck Men。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 Vibram®’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™ Dry Footbed Insert Topcover with NZYM™ for Odor Control and Moisture Management APMT000