Our gripper socks are made of 100% Polartec fleece, recognized as the ultimate fleece fabric. They provide warmth without weight, do not pill, are machine washable and dryable, 100% polyester and hypo-allergenic. Cozy and warm slipper socks for sleeping or lounging, they end below the calf and are non-binding. There are two sizes: Size Medium fits ladies' sock sizes 7 to 10 or men's sock sizes smaller than size 10. Size Large fits men's sock sizes 10 to 12 or ladies' sock sizes larger than size 10. Tiny fibers create multiple air cells that trap warmth inside, while excellent wicking properties keep moisture away from the body. The fabric is breathable to avoid overheating. PLEASE NOTE: The manufacturer has discontinued making the gripper bottoms. We have listed the amounts available in each color and size. Other ways to chase away the cold: Fleece Bed Socks, Shoulder Cozy and Fleece Cardigans. And another great gift idea: Norman Rockwell Lap Trays L-174$12.00Select: Rose Size L (10 available)Burgundy Size L (1 available) Use our secure online ordering system or call 1-888-640-0814. We offer free shipping for orders totalling $100.00 or more and shipped within the U.S. Name labelling (if desired) is free regardless of the size of the order. For information about paying by check or money order, please click on the black INFO button in the upper left corner of the page.