Personalized Blue Monster 1st Birthday Newborn Layette. A blobby blue monster holds a yellow balloon and wears a bright birthday party hat as it celebrates the one year old's 1st birthday! 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