Made of 100% Cotton. Comfy knee-length sleepshirt has cap sleeves and a winking Hello Kitty. Extra detail with a 3-D bow! Turn inside out. Machine wash cold. Wash separately or with like colors. Gentle Cycle. Only non-chlorine bleach when needed. Tumble dry low. Remove promptly. Do not iron. Sizes run as follows: Small (3-5), Medium (7), Large (9) and X-Large (11-13). This is the teen/adult line - the sizes run small, but this is not the kids line.