They are good and they are bad. Good thing-they are made to fit the Reptarium and are a pretty thick soft plastic material and they hold water in. Bad things-they fit over the frame but inside the mesh giving crickets and worms a great place to hide. Also mucky dirt gets caught inbetween the frame and the softray and the mesh-to really clean them you have to take the entire thing apart. I have started using plastic trays underneath the Reptariums that just catch water-so to clean I just take the Reptarium out and power-hose it off.