The SmartWool PhD Ski Race Sock has light cushioning strategically placed in the shin and heel, to ensure youre protected as you race the gates. SmartWools 4-Degree Fit System keeps the sock in place, while WOW Technology in high impact zones reduces shock and abrasion. Features 64% Merino Wool 34% Nylon 2% Elastic SmartWool fibers have the unique ability to absorb moisture as a vapor but repel it as a liquid. SmartWool fiber helps regulate your bodys temperature, keeping you cool when its hot, and hot when it‚ its cool. SmartWool resists bacteria, which can cause odor. SmartWool fiber can withstand the rigors of everyday wear & tear. Product code: 10-337