Personalized I Believe In Santa Long Sleeve Creeper. Cute Christmas Long Sleeve Creeper - White with Santa Claus cap says I BELIEVE IN SANTA JUST BECLAUSE. For anyone who still believes, just because. 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.