Personalized We Are a Dog and Mouse Pair Newborn Layette. 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 Newborn Layette - Heather, great for a pair of besties, twins, siblings, and more. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months