Muck Boot Men's Apex Pro Arctic Waterproof Rubber Fishing Boots - The Apex Pro is built for high endurance cool and cold weather pursuits or treks that require a more athletic and agile boot. 100% Waterproof Vibram(R)'s All-New Arctic Grip All Terrain outsole with XS Trek Evo compound and their New Traction Lug Technology Fully lined with 4mm CR Flex-Foam Neoprene, 100% Waterproof Lining is exceptional comfort, flexibility, shock absorption and heat retention Breathable mesh lining facilitates air circulation Dual density comfort footbed with memory foam EVA midsole for lightweight comfort and shock absorption Extended rubber coverage for added protection bioDEWIX(TM) antimicrobial footbed Insert topcover with NZYM(TM) for odor control and moisture management Outsole is durable and grips on all terrains wet or dry or loose, no matter the season Pull-tab for easy on and off Rubber overlays that provide additional protection along the shin and forefoot without adding unnecessary weight Estimated height: 12in Estimated max calf circumference: 17in Comfort temperature range: -20degF to 50degF Style: APMT-000