Our multiple layer laminated fabric features multi-layered, laminated fabric superior water resistance and longevity, while allowing excellent moisture control. The solution-dyed fabric and special TPU material we use to make these covers give them outstanding temperature tolerance: they can withstand as low as -35°F in cold weather without cracking; and up to 350°F (275 for Gold series) on hot surface without melting. In addition, out covers have 1,000 -1,500 UV hours under sunshine, several times longer than the conventional cover products on the market. We are constantly working on new fabric technologies to ensure our Hentex brand represents the good quality outdoor covers you can find on the market.