Merrell Men's Chameleon Shift Mid Waterproof Hiking Boot 100% Synthetic/Leather/Fabric Imported Synthetic sole Shaft measures approximately 4.5" from arch Waterproof hiking boot featuring padded collar and lace-up shaft with speed-lace hardware at top Strarafuse exoskeleton fuses heel cage to upper for enhanced durability Compression-molded EVA In-Board foot frame for cushioning M Bound TRK midsole for responsive, durable cushioning Shock-absorbing air cushion heel