The Play-Zee-Bo by Gorilla Playsets is a great place for kids to play! The roof is made of a durable, multi-color, fire-retardant polyester that is waterproof and resistant to mold, mildew and ultraviolet (UV) light! It potects your child while they play! The custom sandbox cover is included with the product, and it is an east to attach cover with velcro straps. Gorilla Playsets' cedar naturally resists rot, decay, and insect damage. All required lumber is included! It comes pre-cut, pre-drilled,and pre-sanded for safety.