Baby Sleeping Bag. This bunting/sleeping bag is adorable. It is a mid weight (i.e. not for super hot or super cold weather/rooms). The fabric is soft and has a slightly cool feel to it. My son is long for 5 months and this bag has plenty of room for him to grow. I had surprised my husband with this bag and his first thought was we need to use it for photo props and take pictures from above him with it.