This tunneled greenhouse from Outsunny is constructed using a solid steel pipe frame and durable PVC plastic cover. It's perfect for seeding or just to protect your young plants from the outside elements, shielding plants from dust and wind and keeping out pests so that they thrive inside the proper temperature. The lightweight design is portable yet sturdy for long lasting outdoor use. Double zippered roll-up side doors offer easy access and good ventilation. Simple assembly is required.