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, lightweight, 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 odour-control and moisture management. Vibram Arctic Grip A.T for wet ice traction improved grip on wet and dry surfaces.