Personalized Senior Year Rocks Newborn Layette. Senior Year rocks text with three happy rocks holding 12th Grade flags is a funny gift design for parents, high school teachers and students. 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