The Apex Collection, all new from The Original Muck Boot Co. The Apex is a high-performance boot built on an innovative platform for high endurance outdoor pursuits requiring a more athletic and agile boot. 100% waterproof and coupled with breathable mesh linings to provide elite protection and moisture management. The upper features a lock-down zipper closure system, a natural scree collar and surprisingly light-weight performance for great all-day comfort and fit. Equally at home on loose rocky terrain, cold/wet ground and of course, the MUCK. 100% Waterproof Bio Dewix Breathable Mesh Lining FB 3 Temperature Rating Sub Freeze100% WaterproofBreathable Mesh LiningDual Density Insole for All Day ComfortEVA Midsole for Lightweight Comfort and Shock AbsorptionLugged Rubber Outsole for Durable TractionbioDEWIX(TM) Antimicrobial Footbed Insert Topcover with NZYM(TM) for Odor Control and Moisture ManagementOur lightest outdoor pursuit boot - Weight 2.65 lbs size 9