The Apex PAC ALT Closure offers a fresh new adjustable closure system to fit the needs of all. Built to be always ready for most any outdoor pursuit, this highly versatile boot also includes our new and improved Thermal Regulating Fleece. It is 100% Waterproof and made with 4 mm neoprene. Features include an adjustable strap closure for a tailored fit, Thermo Regulating TR Fleece to improve moisture management in a comfortable temperature range, a Dual Density Footbed with Memory Foam for Long Lasting Comfort, and a bioDEWIX Dry Footbed Insert Topcover with NZYM for Odor Control and Moisture Management. It also has a Lightweight EVA Midsole for All Day Comfort and Support, and a Lugged Rubber Outsole for Durable All-Terrain Traction. The boot is constructed with Muckskin flexible neoprene with an abrasion resistant rubber coating.