I bought one of these hemp mats for Nibbles playpen. When it arrived I wasn’t sure if he would like it but it turns out he loves it. They are easy to clean and don’t smell. I think they are a great alternative to put in they playpen and are natural and not easy to destroy when hamsters start chewing or burrowing. Nibbles doesn’t try to get out of the playpen like he did before I had the mat. He’s very happy in there.