Protect your plants from the cold with this easy to install frost cloth cover. This cover will provide up to 10 degrees of frost protection, meaning that if it is 25 degrees outside, it can keep the temperature under the frost cloth to 35 degrees. Built to fit Thrive Frame Systems. Sewn in Tucson Arizona to fit, with zippers in each corner and a bottom edge strap and under the bench magnet system to reduce cold air flow. Each panel has magnets for easy pinup to the steel frame.