I've been using Combi Mini's underwear and pajamas since my baby was little. 100% cotton Feels good on the skin, and the fabric is soft and durable. In the fourth photo, if you look closely, you can faintly see what looks like a yellow stain or a mark from a yellow pen. I didn't even notice it, so you have to look closely to see it. In the fifth photo, there are marks where name stickers were attached and then removed. Please consider purchasing if you understand. It's thick, so it's especially recommended for this time of year. Would be great for both girls and boys (^^)