From the inside out, this 6" hiker features 200g of PrimaLoft® Bio™ insulation and a B-DRY waterproof membrane. The Andesite is at home in ice-laden mountain towns. It features waterproof oiled nubuck leather, recycled components, and a Vibram Arctic Grip A.T. sole made of Vibram XS Trek. Arctic Grip technology helps prevent slipping on wet ice.