Zipper closure Hand Wash Only. Allow to air dry. Iron on low heat if necessary. Store in a cool, dry place. The new Arctica with ice hook technology is the first winter boot to keep you on your feet in icy conditions! Waterproof and durable, the new Arctica Winter Boot will keep your feet warm and dry all winter long. With soft flexible Vylon uppers and waterproof membrane foot, 3M Thinsulate insulation inner lining and moisture-wicking synthetic lining.Features: Winter grip outsole with retractable Ice Hook technology for stability and tractionIntegrated reflective panels and sturdy, durable YKK zipperConstructed of the advanced Vertycore shock reducing technology for lightweight cushioning and all-day comfort