Personalized It's My Birthday Newborn Layette. Three adorable animals celebrate your child's birthday. Cute t-shirt for a birthday party! 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