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