Personalized Tennis Heart Newborn Layette. Tennis heart - For anyone who loves tennis so much that a tennis ball has replaced their heart. Great gift for any tennis fan! 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