This is a baby sleep sack (pink) from familiar. The size is 60-90cm, so it can be used for a long time. This item was used from newborn. Snap buttons are located on the shoulders, as well as three on each side, preventing it from coming off during rolling over and preventing the baby from getting cold. Also, when the baby gets hot during sleep, you can easily take it off by simply opening the snap buttons. As the baby grows, you can use it as a loose vest without fastening the buttons at the hem. It has six layers of gauze, so I think it can be used all year round. There is a feeling of use, such as fluffing and pilling. There are no major stains, but there may be oversight of small stains. We appreciate your understanding.