The Northside renegade waterproof boot provides rugged protection from the cold the upper is made from durable leather and synthetics and its waterproof to ensure snow and slushy don't seep inside the renegade boot has a whopping 400G of insulation giving it a cold rating of 40 deg F a moisture wicking lining helps prevent sweat from building up and a cushioned insole keeps feet comfy 9 height leather and synthetic upper material 400G thermolite insulation is cold rated down to 40 deg F waterproof to keep feet dry moisture wicking lining helps guard against sweat cushioned insole for comfort rubber sole provides good traction