Featuring an 8mm neoprene bootie with fleece lining wrapped in layers of soft rubber so your feet will stay warm and dry in the most extreme conditions. 100% Waterproof 8mm Neoprene Bootie for Comfort and Performance(5mm Mid) Cool Weather Lining: Soft, Insulation, Light-weight, Performance Materials for Warmth and Comfort Extended Rubber Coverage Rugged Spandura Upper for Durability Lightweight Midsole for All Day Comfort and Support bioDEWIX Anti-Microbial Footbed Insert Topcover with NZYM for Odor Control and Moisture Management Vibram Arctic Grip A.T for Wet Ice Traction Improved Grip on Wet and Dry Surfaces