Cork Bark Flats are sections of bark from trees farmed in Portugal. Cork is a completely renewable resource, as the trees can be harvested every 7 years. Cork makes great decor or hides for your reptiles or amphibians, or can be used to make a background in a vivarium or terrarium. Cork from Josh's Frogs will hold up in a wide range of environments, and makes a great addition to any vivarium or terrarium!