These heavyweight, mid-calf FoxSox with thermalined construction provide warmth all day. Extra softness and cushion will keep you comfortable and dry no matter what you&';re wading through. Our exclusive Wick Dry(TM) technology keeps feet dry. Fully thermalined construction insulates to block out cold Reinforced toe and heel add durability and longer sock life Exceptionally soft and cushiony for added comfort and to absorb shocks Smooth, flat comfort toe seam 63% Acrylic, 22% Nylon, 13% Wool, 2% Spandex