Personalized 1st Birthday Monkey Newborn Layette. Go on a safari or zoo trip with this adorable number one 1st Birthday Monkey Newborn Layette - White. 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