Personalized Rock On Long Sleeve Creeper. Rock On. A rock sits atop the word on is a humorous twist to a common phrase. Make your favorite rockers and music lovers smile with a unique gift at birthdays, holidays, graduations and back to school. For chillier weather, dress baby in this soft long sleeve creeper in a great fitting 1x1 baby rib. 5.0 oz., 100% combed ringspun cotton, 1x1 baby rib. White is sewn with 100% cotton thread, Flatlock seams, Double-needle stitched rib binding on neck, shoulders, sleeves and leg openings,Reinforced three-snap closure on binding.