Introducing the Arctic Sport II Ankle. This new style is crafted from Muck&';s traditional hand laid rubber. To reduce weight and increase flexibility, we utilized our Muckskin technology. This technology features a printed rubber coating over neoprene that is 100% waterproof, 100% MUCKPROOF and abrasion resistant. This new ankle height allows for an easy on/off experience for all your wet, cold chores. 100% Waterproof, 100% MUCKPROOF 5mm Neoprene Bootie for Comfort and Performance bioDEWIX(TM) Anti-Microbial Footbed Insert Topcover with NZYM(TM) for Odor Control and Moisture Management Lightweight EVA midsole for added comfort Muckskin Flexible Neoprene with Abrasion Resistant Rubber Coating Rugged Rubber Outsole for Traction Warm Lining: Soft, Insulation, Light-weight, Performance Materials for Warmth and Comfort