This sleeping bag is made of soft, absorbent gauze material. It's a convenient item for keeping warm and regulating body temperature during sleep time. The front opens wide with a zipper, making it easy to change clothes while the baby is lying down. The fit and length can be adjusted with snap buttons on the sleeves and hem. You can secure it by threading stroller belts through the hole in the back. It's perfect for home use and also recommended as a gift. The blue one has a few pills, but no noticeable stains. It was only used by one person for a few months. Both are M size. ■Size Guide S size: 3-6 months M size: 6-12 months L size: 8-24 months *This is just a guide. Please check the size chart for details. Material: 100% cotton M (6-12M) 80 27 22.5 L (8-24M) 90 30 24