Eastbay EVAPOR Performance OTC Socks Let nothing stop you from being the best in the Eastbay Performance Game Over The Calf Sock With EVAPORô. These socks use Eastbay's EVAPORô construction to wick unwanted moisture away from the skin to the surface where it can be easily evaporated, leaving you cool, dry, comfortable and ready for action. The reinforced shape and arch work with the cushioned sole to provide extra leg support, increasing circulation and performance. 68% polyester/11% elastic/8% stacool/8% nylon/5% endurall. Made in the USA.