The Kenetrek Canyon Sock is a light weight, multi-tasking sock that repel water, regulate body temperature, and are reinforced and padded to avoid blisters and bunching. Combining polypropylene and Silver Technology, they are a very versatile sock; great as a hardcore activity sock or they can even serve as a liner in extreme conditions. Boot height, light weight. Made in USA. 77% Polypropylene, 17% Nylon, 3% Elastic 3% Lycra.