Made in USA of domestic and imported yarns.
Fiber content: 85% THOR•LON® acrylic, 9% nylon, 6% elastic. Unique padding in the ball and heel for enhanced mobility and maximum protection, clinically shown to reduce blisters, pain, pressures and moisture. Exclusive THORLON yarn promotes circulation and holds top in place. Thorlo - Moderate Cushion Over-Calf Anti-Fatigue Military Socks | MS.