ProRep Bark Pieces are harvested from sustainable commercial forests in the UK and Europe and is one of the most widely used and trusted substrates. It helps to provide a suitable environment for all species that require high humidity by absorbing water and releasing it slowly back into the atmosphere. Bark Pieces can be used as a substrate for larger species of reptiles and amphibians. Because of its large size and attractive appearance it is also suitable for constructing hides or other structural parts of the environment for smaller species, or as dcor.