This Outsunny replacement greenhouse cover will allow you to keep your plant-growing going, if the old shell should ever come to damage. When winter frost brings its wavering temperatures, ensure your plants are protected. Our tarp is made of a PE mesh cloth that helps keep your crops at the right temperature. Easy to access and ventilate with roll-up doors and windows, heat, UV and humidity are in your hands. Extend the longevity and value of your greenhouse.