Exo Terra Forest Moss is real compressed moss grown in tropical Asia. This ecological substrate is ideal for increasing humidity in the terrarium and is totally safe for frogs, salamanders and burrowing or digging animals. The Exo Terra Forest Moss is extremely absorbent and is recommended in humidifying shelters such as the Exo Terra Snake Cave or Reptile Cave. It is also an ideal egg-laying or incubation medium. Substrates in natural terrariums serve many functions and are not only there for decorative purposes. They play a very important role in the determination of the terrarium's microclimate. The Exo Terra® Tropical Substrates are ideal to create natural planted terrarium set-ups for humidity-loving reptiles, amphibians and invertebrates from tropical environments. The hygroscopic properties of the Exo Terra® Tropical Substrates regulate the terrarium's relative humidity in a natural way by absorbing and slowly releasing moisture. Adequate relative humidity levels aid in shedding and help prevent respiratory infections. The all natural Exo Terra® Tropical Substrates stimulate natural digging and burrowing behavior, and allow reptiles to shape firm nesting burrows similar to their shelters in nature. By slowly releasing moisture at night, the Exo Terra® Tropical Substrates stimulate the natural absorption of moisture by the reptile skin, so that dehydration in tropical animals is much less likely to occur. The unique size and shape of the particles discourage crickets to hide in the substrate. The Exo Terra® Tropical Substrates are extensively tumbled to smoothen the particles and remove excessive dust, than heat-treated to reduce bacterial contamination. This ecological substrate is the safest on the market for use with reptiles, frogs, salamanders and burrowing & digging animals. The unique size and shape of the bark particles allow frequent irrigation of your plants while still providing good aeration for healthy root growth. This improved aeration promotes a flourishing population of beneficial, nitrifying bacteria, and prevents root rot, making the Exo Terra® Tropical Substrates the safest choice for naturally planted terrarium setup. Exo Terra® Tropical Substrates are absolutely non-toxic, free of chemicals & pesticides and can be safely composted in your garden.