Mildew resistant vent. Heavy duty water resistant, UV treated polyester.Fits round, oval or square table and chairs up to 104" Dia.Heavy duty vinyl with polyester backing.Keeps table and chairs clean and dry.Velcro ties keep cover secure.Clean with a damp cloth.Size: 104"dia. x 31"HMeasure your patio set dimension after putting chair close to the table or underneath the table to make sure this cover fits your patio set.You can always move the chair around to make the cover fits your patio set.Suggest you put some Empty carton in the center of the table so the water or snow will fall off the cover.