Lucky Reptile Desert Bedding is a specially developed terrarium substrate for desert and savanna terrariums. In nature, very few animals live on sand – in fact, many even avoid sand. Desert Bedding replicates the substrate found in dry regions and has a high clay content, allowing animals to create burrows just like in the wild. Additionally, moisture is retained in the lower layers, which is important because many desert reptiles, such as spiny-tailed iguanas, can absorb moisture through their skin.