This is a knitted romper. It's size 70cm, but the size indication is 6-12 months. There is no washing tag, so the material is unknown, but it's not itchy wool. I have washed it in the washing machine normally. One button in the center of the crotch is a snap button, and all the others are the same kind of buttons as on adult clothes. It has been stored for a long time, but I think it can still be worn. Thank you for your consideration.