Blister control for comfort Tube Design Over-the-calf tube design offers a comfort top that delivers a secure fit Moisture control to keep feet dry Our TCK Prosport OTC socks are a must have for your next game, outing, or practice. Designed by the leaders in team athletic socks, the Prosport is the ideal weight and length for athletes, while it also provides maximum performance and durability. TCK was founded in 1961 in North Carolina, where we still operate today. When purchasing TCK products, you can feel proud to support a USA based company that directly supports American employees.