Merrell Mix Master Tuff Mid Waterproof Mens Hiking Sneakers Synthetic Rubber sole Lightweight breathable mesh upper for ventilation, with synthetic overlays for support and durability M-select dry waterproof membrane seals out water and lets moisture escape to keep feet dry and comfortable EVA cushioned footbed is equipped with AEGIS Microbe Shield antimicrobial technology for protection against odour, staining and deterioration caused by bacteria and fungus Merrell Float midsole is 10% thinner and 25 % lighter to provide more feel and ground control Merrell air cushioned heel offers shock absorption and adds stability