Men's Muck Boots Outmax Ankle Outdoor Work Boots Ready for wet trails, muddy chores, and everyday outdoor wear, this ankle boot delivers protective performance in an easy pull-on silhouette. The rubber construction is 100% waterproof and 100% MUCKPROOF, helping keep moisture and messes outside. BioDEWIX™ Dry with NZYM™ uses natural, plant-based enzymes to help break down odor-causing material from sweat and keep feet feeling fresh. A BioLite foam midsole adds exceptional underfoot comfort, while the rubber outsole provides a durable base for outdoor adventures.