Personalized Big Sister Super Hero Newborn Layette. Pow! Big Sister Super Hero is here to save the day! Bright and bold comic book style great for any super big sister. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months