Muck Men。Easy On/Off: Pull tab for convenient and quick wear Odor Control: bioDEWIX Dry Footbed Insert Topcover with NZYM for managing odor and moisture Custom Fit: Velcro stretch collar allows for a personalized fit Durable Zipper: Upper features a lock-down zipper closure system with a waterproof YKK zipper Waterproof Protection: 100-percent waterproof construction with breathable mesh linings Comfort and Flexibility: 5mm CR Flex-Foam neoprene liner provides comfort, flexibility, shock absorption, and heat retention Durable Traction: EVA midsole combined with a lugged rubber outsole for reliable traction on tough terrain