The primary materials that compose this product contain a minimum of 20 percent recycled content. Get superior comfort and flexibility as you hit the trails or the streets wearing the Smartwool Run Zero Cushion Mid Crew Socks. 4-Degree Elite Fit System construction uses two elastics to provide better stretch and to keep your sock in place. Indestructawool is engineered to provide maximum comfort and durability. Shred Shield reduces wear and tear on the toes for added durability. Virtually Seamless toe is designed for all day comfort and to minimize chafing. Mesh panels on the out step help provide added breathability. Mid-crew silhouette. Elasticated top for a secure fit. 49% Merino wool, 24% nylon, 23% recycled nylon, 4% elastane. Machine wash, tumble dry. Made in the USA.