Personalized Superhero 7th Birthday Long Sleeve Creeper. Happy 7th birthday! Celebrate your child's seventh b-day with a cool SUPER 7, superhero gift. Happy Birthday seven-year-old! 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.