Personalized This will be the Best Birthday Ever Long Sleeve Creeper. While all birthdays are worth celebrating, this one will be the best ever! This will be the Best Birthday Ever Long Sleeve Creeper - White & Black w Ears, featuring Mouse from the children's book "Dog and Mouse" my Michelle Nelson-Schmidt. 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.