I used these shoes for about a month as my baby's first shoes. They were able to walk on the grass without any problems. Perhaps because they're used, or maybe from the start, the whole shoe, including the heel, is soft and lightweight, so they might be good for children who don't like heavy shoes or for indoor practice. When I did a home cleaning, the insole (a type that can't be removed) came off, so I've reattached it with glue and am letting it dry. I attached it quickly, so I apologize for the poor appearance. Because they are soft, I plan to fold the opening and compress them for shipping via post. Thank you.