I purchased this for my winter-born baby from the Belle Maison official website, and my baby wore it when they were about 2-4 months old. It has an inner layer of underwear, making changing very easy. The two-way design for the feet means it can be worn for a relatively long time, even after the baby starts moving around. There is a milk stain on the neckline. Please understand that this item has been worn before. Thank you.