Personalized Heart Belongs To Mummy Boy Newborn Layette. Halloween Newborn Layette - White with a cute baby boy mummy with two front teeth and his jack-o-lantern. He says MY HEART BELONGS TO MUMMY. 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