Personalized Pi Math Day grunge Newborn Layette. Pi Math Symbol Newborn Layette - White has fun grunge look. graphic licensed from and c. www.graphicsfactory.com 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