Personalized Our First Christmas Twins Elf Outfit Newborn Layette. Celebrate baby's 1st Christmas with this adorable elf design for your twin boys or twin girls. 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