Longer-length Thermolite« liner for extra protection under boot field and other winter socks. ò Wick Dry« Health System keeps feet dry and comfortable ò Thermolite« super soft hand ò Knit in elastic rib top for comfort fit ò Smooth jersey knit leg and foot ò Over-the-calf ò Ultra light weight Contents: 50% Thermolite« polyester, 50% stretch nylon, except 3% Lycra« spandex added to top.