This is a Keratta sleep sack that completely separates and is easy to put on and take off. The inside is gauze material, and the outside is a high-quality, fluffy flannel, providing just the right amount of warmth to wrap your child in during the winter! I purchased it for 3,680 yen. It can be used from newborns to around 4 years old. The popular snowflake design is very cute ^_^ This sleep sack has been worn a few times and is in a clean condition with no stains. It will be shipped compressed.