Frost Protek Plant Cover: Bag, Green Protect plants from light frost, cool nights, wind and heavy rain, during the growing season. Protect plants from birds, insects, deer, rabbits and other pests, during the growing season. Lightweight breathable fabric allows air and UV light to reach plants. No need to remove each morning and replace each evening. It will not damage plants. Fabric is spun polypropylene, which is also used by commercial growers for plant protection. Washable, air dries quickly, easy to store and can be used season after season.