Features of the Ariat Men's Catalyst Defiant 8IN GTX Insulated Boot Cobalt VX Technology for temperature management, advanced support and enhanced flexibility Premium waterproof leather Upper Premium waterproof, breathable Gore-Tex membrane construction X-Static pure silver sock liner for permanent anti-odor Performance Premium leather collar and tongue lining Protective rubber rand Cushioning PU Midsole Molded TPU heel Cradle Vibram Outsole with exclusive Ariat design