This Outsunny replacement greenhouse cover will allow you to keep your plant-growing going, if the old shell should ever come to damage. It's made from PE mesh cloth, which helps to protect your crops from any outside weather which might prevent them from growing fully. The bottom edge gives room to add weights and keep the cover in place. It features roll up windows to allow air to circulate inside, and it's finished with a large zipped door for easy access in and out. OUTSUNNY Greenhouse Replacement Cover ONLY for Tunnel Walk-in Greenhouse in Ivory