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- 100% Waterproof- 4 mm neoprene- Adjustable strap closure for a tailored fit- Thermo Regulating TR Fleece, improves moisture management in a comfortable temperature range.- Dual Density Footbed with Memory Foam for Long Lasting Comfort- bioDEWIX Dry Footbed Insert Topcover with NZYM for Odor Control and Moisture Management- Lightweight EVA Midsole for All Day Comfort and Support- Lugged Rubber Outsole for Durable All-Terrain Traction- Muckskin flexbile neoprene with abrasion resistant rubber coating