SmartWool Toe Sock Micro - Past Season 57% Merino Wool, 40% Nylon, 3% Elastane 4" high 1" wide 4 Degree Elite Fit System offers great stretch and recovery for a better fit Patented Reliawool Technology in high wear areas for maximum durability Mesh ventilation offers increased breathability - Articulated heel for comfort Elasticized arch and ribbed let keep the sock in place Style SW058