Since reptiles and amphibians are cold-blooded creatures, they often rely on warm surfaces to help keep them warm. Exo Terra’s Ultra Thin Terrarium Substrate Heat Mat is a heater designed for your pet’s terrarium and mimics surfaces that are naturally heated by the sun to make your sidekick feel like he’s in his natural habitat. This mat is a great option for reptiles, amphibians, arachnids and planted terrariums. These mats provide 24-hours of even heat and can be used as a primary or secondary heat source. Whether you choose to mount it under your glass terrarium or on the side, your pet is going to love having the option to rest on a nice, warm surface.