Each plant cover unfurls to 250 by 12 feet s worth of plant blanket and are made from a Uv-proof polypropylene fabric that provides 6-8 degrees of protection for your plants. While the plant freeze protection covers keep the cold away from your plants, they still allow 50 percent of sunlight to pass through and give your plants their nutrients.These frost cloth plant freeze protection rolls are very simple and easy to use, so even those who are just starting out their gardening phases will be able to use this thermal garden cover effortlessly. Just take out the large blanket plant freeze protection covers and cover or wrap it over your plants before the snow hits, and use some landscape staples and pins to keep it from flying away.