EUC Winter Boot Waterproof leather and performance mesh upper. KEEN.Dry™ is a proprietary waterproof, breathable membrane that lets vapor out. 200g KEEN.Warm™ Recycled PET insulation rated to -25°F/-32°C. Traditional lace-up design with metal hardware for a secure fit. Interior features treatment for natural odor control and a fresher foot environment. Moisture-wicking lining for better breathability and a drier foot environment. Thermal Heat Shield insole captures warmth to keep out the cold elements. Compression-molded EVA midsole offer shock-absorption and padding for all-day comfort. Stability shank for added support. KEEN Patented Toe Protection wraps up and over the toes for ultimate protection. KEEN.Polar Traction outsole for more grip on snow and ice.