Personalized We Are a Dog and Mouse Pair Long Sleeve Creeper. This duo find friendship in the most unlikely of ways in "Dog and Mouse" by Michelle Nelson-Schmidt. We Are a Dog and Mouse Pair Long Sleeve Creeper - Heather, great for a pair of besties, twins, siblings, and more. 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.