Personalized Dog and Mouse Best Friends Newborn Layette. Friends are always there for you - rain or shine. Dog and Mouse Best Friends Newborn Layette - Heather features two scenes of this budding friendship from "Dog and Mouse" by Michelle Nelson-Schmidt. 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