Dahlgren HalfPass Socks, Charcoal, Large Toe, Heel, Wicking Channels: 55% Merino Wool, 27% Nylon, 18% Alpaca Body: 75% Polyester, 23% Nylon, 2% Spandex Made in US Alpaca/Merino wool in wicking channels absorbs moisture; ThermaDri Hydrophobic transfers moisture out of sock keeping feet drier, more comfortable Half cushion, half crew for light cushioned comfort while hiking, cycling, or casual wear Lightest weight, flat knit top Patented Dri-Stride System Therma-Dri in transfer & evaporation zones