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, features 4 mm neoprene, and an adjustable strap closure for a tailored fit. The Thermo Regulating TR Fleece improves moisture management in a comfortable temperature range. It also includes 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. The lightweight EVA Midsole provides All Day Comfort and Support, while the Lugged Rubber Outsole ensures Durable All-Terrain Traction. The boot is made with Muckskin flexible neoprene with an abrasion-resistant rubber coating.