Carhartt A2070 Lightweight Western Boot Over the Calf Sock. Specifically designed for western boots, our over the calf sock is just the right thickness to fit comfortably in Western styled leather. Constructed of lightweight, non bulky ultra-spun polyester to keep feet dry and comfortable. Over the calf length and arch support helps to keep the sock from slipping down into boots. Technically engineered graduated compression aids circulation, helps reduce leg fatigue and ensures socks stay up. 84% ultraspun polyester, 15% nylon and 1% lycra spandex.