Does anyone know where I can buy . . .?

baby fleece wraps? My sis-in-law just had a baby and the nurse said that babies aren't supposed to sleep wrapped in blankets anymore. They had the baby in and sent her home with a fleece sac that zips from the bottom and then has flaps on the side that velcro tightly around her to keep her swaddled. I was wondering if anyone knows what I am talking about, or if you have seen them anywhere? I looked on the Babies R Us website but couldn't find them. Thanks in advance!