The Exo Terra Equatorial Forest Floor is a multi layer substrate that allows you to recreate the forest floor as found in natural equatorial forests. The forest floor is one of the most distinctive features of the equatorial forest ecosystem. It usually consists of two major layers; The top layer mainly consisting of fresh leaf litter The base layer consists of rich organic matter - usually decomposed leaves & wood The top layer consists of sun dried decorative Ardisia leaves from a sustainable resource. With this decorative top layer you can actually create the soft floor covering found in natural equatorial forests. The Ardisia leaves provide a soft layer for animals to burrow and cover their secret hideout. Most reptiles and amphibians forage the forest floor in search of food and water. The top layer covers the actual substrate underneath to facilitate its moisture retention and prevent the soil from drying out.