Snoozies Mens Fleece Lined Non-Skid Slipper Socks 100% Polyester Pull On closure Made of polyester with skid/slip resistant sole Soft Sherpa fabric lining for comfort and relaxation Men's Size Scale: Small (7-8), Medium (9-10), Large (11-12), X-Large (13) Slips on easily and lightweight for easy traveling Machine washable