Size: One-size fits US 4.5-7.5.Quality: The elastic band of the ankle does not press the legs, providing the best comfortable wearing experience during daily activities and sleep. Premium microfiber socks provide maximum warmth and softness to your feet so that you don't sweat. It is light and perfectly warm by tightening the thread of fabric with a fine needle when sewing.Sense of use: Keeping your feet warm is important for your health. It will strengthen blood circulation and health. Wear sleeping socks when you go to bed. Sleeping socks warm your body and stabilize the rhyme, allowing you to sleep deeply while playing Sugar Dream.Value: Stylish and various colors and designs are available, and it is the best gift for friends, family, and lovers. 4 pairs of cozy socks are provided.