Personalized Black Math Universe Newborn Layette. Math is the language of the universe text in black and white. Fun gifts for math lovers at birthdays, holidays, graduation and back to school. 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