The Gracie Crew Lite is a comfortable year-round favorite. Contour arch support for comfort. Impact cushioning in key areas. Left and right design for optimal fit. Seamless toe in flex zone to avoid bunching. Y-heel pocket to keep sock in place. 48% nylon, 45% Merino wool, 5% polyester, 2% spandex. Machine wash warm, tumble dry low. Made in the USA and imported.