Waterproof nubuck leather uppers with contrast stiching. Dual elastic gores for a secure fit. Merrell Conductor Fleece for heat retention and comfort. PRIMALOFT® insulation treated with antimicrobial, will keep your feet cool and dry. THERMO removable footbed for increased support and comfort. Compression molded EVA footframe for stability and comfort. Heel features Merrell Air Cushion provides shock absorbency and cushioning. Vibram outsole with sticky rubber is durable and slip resistant.