Natural rubber upper for added softness and flexibility. Synthetic upper with faux-fur cuff. Lace-up closure with bungee cord for extra security. Pull-on tab at rear for easier on-and-off wear. Constructed with 3mm waterproof Bog Neo-Tech insulation. Max-Wick moisture-wicking lining helps feet stay fresh. Cushioned footbed features DuraFresh biotechnology to fight unwanted odors. Non-marking, non-slip rubber outsole with a self-cleaning tread. Comfort rated from temperate to 5