The warmth of wool and the safety of nonslip suede soles make these cozy MUK LUKS slipper socks a wonderful wintertime choice. They're designed to kick out the cold while providing reliable traction. From MUK LUKS. Small (7 to 8), Medium (8-1/2 to 9-1/2), Large (10 to 11), X-Large (11-1/2 to 12-1/2) Body 85% ragg wool/15% nylon; outsole 100% suede Machine wash, line dry Imported MUK LUKS Men's Slipper Sox Ragg Wool