These winter-weight thermal crew socks feature a soft sherpa-lined interior providing maximum warmth during the cold seasons. They come with silicone gripper-dots on the sole to prevent slips and falls. They are comfortable for wearing with any sleepwear while lounging around the house. One size fits up to US women's shoes size 10. Made of 100% Polyester. Machine wash gentle cycle, line dry. For better results, hand wash.