Description A refreshed version of the Classic Rib, the New Classic Rib is a cushioned crew sock that offers wonderful stretch and luxurious, soft Merino wool next to your skin. Great fit and maximum comfort. Features Signature Smartwool® sock Ribbing extends to toe 63% Merino Wool, 35% Nylon, 2% Elastane Style: SW0SW915 Benefits Medium Cushion Medium Cushion Medium cushioning for impact absorption Care Machine wash warm, wash inside out. Do not bleach. Tumble dry low. Do not iron. Do not dry clean.