Personalized Santa Hat Cello Newborn Layette. A cello wearing a Santa hat is a funny musical instrument gift tee for string musicians, teachers and students at birthdays, Christmas and the winter holidays. 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