The New Age Pet ecoChoice Fontana Chicken Pen is long lasting without maintenance made from ecoFlex which is a blend of recycled polymers and wood byproducts. It is resistant to moist, warp, crack, and split. The ecoFlex material does not expand and contract like wood so the structure will remain in tact for much longer. Non-absorbant for easy cleaning along with a removable roof to collect eggs easily. Easy to assemble, no tools required. The Fontana Chicken Pen can be used as an independent structure, or be attached to the Fontana Chicken Barn.