Smartwool womens Smartwool Ladies Margarita Crew Height Patterned Casual Socks Black 67% Merino Wool Knit in USA of Imported Yarn: 67% Merino Wool, 31% Nylon, 2% Elastane. Style SW0SW717. WOW Technology (higher density wool in impact zones for increased comfort and durability) 70% Merino Wool, 27% Nylon, 2% Elastane Machine washable