Eco Earth is a compressed coconut fiber that is ideal for all types of reptiles, amphibians, small animals, and insects. It can be used to increase humidity in an enclosure. ,br> Made from an eco-friendly, renewable resource. Naturally absorbs and breaks down odor and waste products. Each Eco Earth brick makes 7-8 liters of substrate and is available in a single pack or an economy 3-pack. Each brick measures approximately 8" x 4" x 2".