Fluffy and Warm sleeper with a cute overall pattern. Size Newborn to 3 years. There are plastic hook buttons on both sides so that they will not be exposed. By removing the hook buttons on the left shoulder and both sides, the sleeper can be expanded, making it easy to put on and take off while the baby is lying down. It can be easily put on by opening and closing the hook button to prevent the shoulders and stomach from getting cold. You can also use it as a stroller when you go out on a cold day. Safe for babies who are energetic and have a lot of movement.