Enjoy the long life and quality craftsmanship of the Sunrise Umbrella 20L x 10W x 7H ft. Greenhouse Replacement Cover. Designed to fit over a greenhouse frame, this replacement cover features a durable green UV mesh polyethylene construction that is strong enough to protect against inclement weather, full sun, and pests. Adjust the air flow and humidity in your greenhouse with the eight mesh zippered mosquito windows line either side of the cover, and the one-piece zippered door which ties out of the way for ease of access. Ties throughout the interior of the cover allow you to secure it onto the greenhouse frame for longer life and added stability.