Personalized 1st Birthday Police Car Newborn Layette. A cute smiling police car has its sirens blaring to celebrate the one year old's 1st birthday. 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