Injinji Trail Midweight Crew Xtralife Socks Lycra^Nylon^Polyester^Spandex Made in USA or Imported Injinji's five-toe patented designed specifically for runners and hikers Prevents blisters & hotspots while running Ideal use for running, walking and athletic activities Superior mositure management during runs of all lengths Fiber content: 39% CoolMax 58% Nylon 3% Lycra