Sand Military Boot Sock is a low volume sock engineered specifically for hot to moderate climates. Acrylic and Wool blend wicks moisture keeping feet dry and cool. Silver Lining™ battles bacteria helping eliminate Foot odor and also aids in prevention of blisters. Go Covert. Contents : 44% Wicking Acrylic / 28% Wool / 19% Nylon / 2 % Polyester / 5% Lycra® Spandex/ 2% Silver Lining™. Silver Lining in Heel and Toe helps prevent Infections and fights Foot Fungus. Absorbent Acrylic helps keep feet dry all day. Stay Up Top with hugging support all day. Thick Wool Cushion heel pad and toe for relief of High Impact. Special wool fights friction and hot spots helping prevent blisters. Built - In Arch Support made for the long haul, special heel for better fit to the contour of the Foot. Instep Flexzone to prevent bunching of the sock. Size: 9 - 13. Color: Black.