Smartwool’s Classic Hiking line is growing, with the Hiking Ultra Light Crew. Specifically designed for women, it offers a little more coverage with its crew height. An open, mesh fabric and two types of rib offer enhanced breathability. – Sock Height: Crew – Mesh ventilation zone – Flat knit toe seam – Elasticized arch brace – Made in USA of Imported Yarn: 67% Merino Wool, 30% Nylon, 2% Polyester, 1% Elastane – Machine Wash Warm, Wash Inside Out. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean.