The North Face Chilkat 400 II Men's Winter Boots Size 11.5 Waterproof leather boot rated to -40 degrees Fahrenheit. PrimaLoft Silver Insulation ECO for ultimate protection and comfort in the coldest conditions. Upper: Full-grain waterproof leather upper. Dryvent waterproof construction helps keep feet dry. 400g PrimaLoft Silver Insulation ECO Rustproof Hardware Gaiter Attachment D Ring Sole Unit: Compression-molded EVA midsole for long-lasting cushioning Durable TNF Winter Grip rubber soles. IcePick temperature-sensitive rubber lugs for increased traction Shaft: height 7.75" / Circ 10" NEW WITHOUT TAGS Smoke-free home