Durable Waterproof Heavy Duty Patio Heater Cover. Enhance the longevity and functionality of your outdoor space with our Durable Waterproof Heavy Duty Patio Heater Cover. Expertly crafted from upgraded 420D Oxford fabric, this cover is not only tear-resistant but also expertly protects against the unpredictable forces of nature—rain, frost, dust, and even bird droppings.