Personalized I Heart Gym Newborn Layette. I heart gym text with an edgy heart and the word gym wearing sneakers is a fun design for gym and fitness lovers on birthdays, holidays and back to school. 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