Personalized Mouse: Be A Friend Newborn Layette. Mouse: Be A Friend Newborn Layette - Heather, from "Dog and Mouse" by Michelle Nelson-Schmidt shows us that being a friend is the best thing you can be. 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