This Outsunny replacement greenhouse cover keeps plant-growing going. Great for when the old one becomes unusable. The three-layer design merges two plastic pieces with a middle reinforcement layer, ensuring it is tough and durable. The roll-up door ensures easy access, with a roll-up door for easy access and windows to allow air inside. The UV-resistant coating gently allows sunlight through to encourage growth. OUTSUNNY Reinforced Walk-in Greenhouse Cover Replacement with Door & Windows in White