Men's winter ankle boots Keen with a water-repellent membrane Men's winter boots Keen Men Nxis (code 1027991) offers comfort in a slip-on design, the shoes are made of a combination of leather and textile material. Waterproof and breathable membrane KEEN.WATERPROOFRubber sole KEEN.FREEZE for great grip even in in cold conditions Durable PFAS-free material with water-repellent properties Recycled material from PET bottles Eco Anti-Odor technology for natural odor elimination Fleece lining for maximum warmth Removable Luftcell PU insole for long-term comfort Material: leather, textile, rubber