Personalized Music And Math Newborn Layette. Music builds the mind for math with the word music in musical text is a unique design promoting the need for music education. 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