My child used these for about two months. The usage period was short, so I don't think there are any noticeable stains, but there are some loose threads and slight pilling. These are used items that my child has used. Also, there are some marks left from removing star-shaped name stickers from the soles. Please check the photos. They have been home-cleaned. I will lightly compress them for shipping. There are no drainage holes, but they are made of mesh material, so I think they can also be used as water shoes.