Waterproof barrier, cozy insulation and dual-climate outsoles give these Keen Blackcomb boots high performance in low temperatures. Waterproof nubuck leather and nylon uppers offer lasting comfort, flexibility and style. KEEN.DRY?äó waterproof, breathable membranes keep feet dry while allowing perspiration to dissipate before it saturates the inside of the shoe. Features lace-up design with heel/toe loops for an easy and secure fit. 200 grams of KEEN.WARM?äó insulation uses a mix of bamboo and polyester fibers to ensure warmth and comfort in chilly conditions. Patented rubber Toe Guard protects feet and uppers against bumps and abrasion. Removable EVA thermal footbeds have heat shield silver film in forefoot area to reduce temperature conductivity and keep feet warm. Compression-molded EVA midsoles offer shock absorption and padding for all-day comfort. Durable and nonmarking dual climate rubber outsoles react to different temperatures to provide optimal traction on wet, dry or frozen surfaces.