Personalized 1st Birthday Superhero Newborn Layette. It's a comic book 1st birthday party. Cool, wow, your little one is a superhero! 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