Angelina Fleece Socks with Brushed Interior and Non-skid Bottom, 2-Pair Pack 20% spandex UNISEX, One Size Fits All Microfiber Fleece-lined Socks Non-skid bottom to prevent slipping Available in 3 different length: ANKLE, CREW, KNEE HIGH Choose from Black, Dark Coffee, and Charcoal colors 80% Polyester; 20% Spandex; Machine washable (preferrably in laundry bags), tumble dry low. For better results, hand wash and line dry.