The Rion Sun Room 2 Greenhouse is the simplest way to turn an existing porch, deck or patio into a great sunroom enclosure or greenhouse space. It has two kinds of virtually unbreakable coverings to give you the best of both worlds. The roof panels are 4mm twin-wall polycarbonate, offering UV protection and diffuse light. The crystal-clear 3mm acrylic sidewalls are 100% UV protected and permit greater than 90% light transmission, while being ultra-safe. Durable white resin frame improves insulation and is maintenance free for ease of use. Hinged door and included roof vent provide air circulation.