These engineered Thorlo® Desert Boot socks are designed specifically for hot weather climates. They have an exclusive THOR•LON® and THOR•WICK®COOL construction that WICKS MOISTURE BETTER, so your feet will FEEL COOLER over the long haul. Unique padding specifically engineered for field training and combat conditions, clinically shown to reduce blisters, pain, pressures and moisture. Cushioned instep and arch for a better fit, more support and less pressure on the feet. Ventilation panel extra moisture control and breathability. Fiber content: 65% THOR•WICK® COOL polyester, 16% nylon, 14% THOR•LON® acrylic, 14% nylon, 5% elastic. Made in USA of domestic and imported yarns.