The Smartwool Women's Hike Classic Edition 2nd Cut Crew Socks are built with yarn constructed with a mix of recycled fibers and virgin Merino wool. This circular design repurposes old materials and breathes new life into them to provide a comfortable and responsible hike-ready fit. These full-cushion socks feature an elasticized arch brace for a secure fit and a flat knit toe seam to prevent irritation. They are also machine washable and made in the USA.