Rainy areas require extra attention for fire pit covers. If you don’t experience many other adverse weather conditions besides rain and intense sunlight, a Polyester material is the best choice for you. Polyester blocks rain, wind, and sun without being too heavy. If your primary concern is rain, polyester will get the job done. Another vital factor for rainy areas is the coverage of the fire pit cover. If your cover is polyester but stops before the legs, they won’t feel any benefits.