I purchased these at the kinukotta physical store. They could be worn for a long time, from around 1.5 to 3 years old. They were not worn very frequently. When my child wears these pants, they look so cute and stylish with any top. They even look great with a plain t-shirt! They are made of gauze material, which is gentle on the skin and feels very soft. There is a faint stain on the bottom, but I don't think it's very noticeable! (It's not from toilet training!) I liked them so much that I felt reluctant to throw them away, and I would be happy if someone else could use them. I am also selling other baby clothes! #きびこどものもの