This is a sleep sack for babies and kids. It is suitable for ages approximately 1 to 8 years old, so it can be used for a long time. I didn't use it very much, but there is some feeling of use. It's short-sleeved, so the sleeves won't get in the way. It's convenient to wear when it's a little cold in the fall and winter. It will be compressed and packed as compactly as possible. 60cm 70cm 80cm 90cm 95cm 100cm 110cm 120cm