Made with plastic the ReptiBreeze Substrate Bottom tray is a perfect lining for your pet's terrarium. A must for enclosures with moist substrate, the tray can be easily removed and substrate discarded. You'll know why it's called ReptiBreeze by how fast you can clean! Made for screen enclosures but a great stand alone option for providing a spot of wet ground in a larger tank. Position under a dripper to catch any leaks or excess water. Have a pet that tends to knock over their water dish? Try ReptiBreeze. Also great for terrariums with live plants that need lots of watering.