Select Size to see the return policy for the item.93% Acrylic, 6% Polyester, 1% Elastane.SOFT COMFY: thermal boot socks are not only practical, but unbelievably soft and cozy Heavily brushed lining makes these stretchy socks provide warm and comfort for feet in extended outdoor trail cold weather gear.MULTI-FUNCTION: The high-quality thermal socks are suitable for different situations, you can wear them as cabin socks, office socks, hiking socks, thermal socks, heavy socks, warm socks, winter socks, socks, outdoor socks, sports socks.MOISTURE WICKING: The material absorbs sweat and moisture, maintains dryness. Perfect for cold winter weather gear outdoor activities like skiing, hiking, and sledding. Your feet will stay cozy and dry all day .DESIGNED FOR EXTREME TEMPERATURES: 7X WARMER THAN REGULAR COTTON SOCKS The insulated heated socks have been specially designed to keep your feet warm even when the temperature outside is way too low.REE.