Darn Tough's Captain Stripes Kids Socks are the perfect over the calf lightweight socks that will keep up with your kids all day. This all weather performance sock features fast action wicking that pulls moisture away from the skin and are made in a performance fit for no slipping, no bunching and no blisters. Great for wearing them with your favorite pair of hiking, winter, ski, or snowboard boots. All weather performance: Cool in the summer,warm in the winter. Covered by Darn Tough's lifetime warranty: No strings, no conditions, for life. 51% nylon, 45% merino wool, 4% lycra spandex, machine wash.