A sleeping bag for babies is like a cozy blanket that they can wear like a giant suit to keep them warm and comfy while they sleep. It's like a special sleeping outfit that covers their whole body except for their face, so they can still breathe and see.
The sleeping bag is made of soft materials like cotton or fleece, so it feels gentle on the baby's skin. It has a zipper down the side or front that makes it easy to get the baby in and out.
The important thing about the sleeping bag is that it keeps the baby in a safe position while they sleep. This means they can't roll over onto their tummy or wiggle around too much, which could be dangerous.
Overall, a sleeping bag for babies is a comfy, cozy, and safe way to help them get a good night's sleep.