Personalized Big Brother Superhero Newborn Layette. Show off you're going to be a Big Brother or if you are already a big brother with this awesome superhero design. 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