This arrived in an impressively small box considering the size of the bag. Product information sheet says to break up and fluff foam and that the bag will continue to fill out over 3-4 days, and this was our experience. At its final size, it is good for our small child, but not that useful for larger children/adults. The cover is soft and comfortable, and although we haven't had to remove to clean it is nice to have this option as I'm sure there will be messes down the road.