This is a sleep sack from Alvi, a popular German baby goods brand. A set of three unused inner layers is included. Product size notation: Outer (62-68) Inner white 1 (62) Inner white 2 (68) Inner gray (68) All are organic cotton. The outer has some yellowing around the neck and some pilling, and shows some signs of wear, but is still in good condition and can be used a lot. I purchased the three Alvi inner sleep sacks separately, and although I washed them, I didn't use them. They can be used as a set or individually, and there are various ways to use them. The design is very cute, and the feel is very comfortable and high quality, so I loved it. I bought everything in Germany. It's rare and recommended because it's not available in Japan.