This product has 3 sizes, please confirm size before purchasing The generator cover is made of durable 210D polyester fabric with a water resistant laminated underlay. 3 sizes available. Can be used for storage. Water resistant stand keeps your generator completely dry. And the full cover with seam sealing tape makes it 100% waterproof. Two stacks of fabric on one side make the cover weatherproof, yet ventilated. Velcro on another side allows for easy on and off. Elastic hem cord and bottom strap allow for a secure, custom fit, especially in strong winds and bad weather.