The inner layer of this air heater is treated with environmentally friendly PU waterproof coating, and the outer layer is made of thickened 600D oxford cloth, which has high material density and good wear resistance. The lid can withstand more than 15000 water pressures. When it rains, the water slides quickly and does not penetrate the lining. [General size] The heater cover measures 33 inches in diameter (dome) * 89 inches high * 19 inches in diameter (base) to provide full coverage from top to bottom. Universal design fits most garden heaters. Please measure your patio heater before purchasing. Our 600D heater covers feature high-density stitching, excellent water resistance and durability. Waterproof zippers provide the best waterproofing to keep your garden heater cover in good condition. Additional reflective bands can make the black warm air shield stand out more in the dark to protect yourself and your family from the impact of warm air. Better protection] This outdoor heating cover features a full-length solid zipper that is easy to put on and take off, and can be easily completed by one person. What's more, the bottom-adjustable drawstring design can better wrap the outdoor heater without worrying about high winds and snow. This upgraded lid provides perfect protection for outdoor heaters from top to bottom.