About this item 100% woven Polyester with laminated Polyvinyl Chloride backing Fits offset patio umbrellas 13′ DIA or 9′ Square Gardelle Fabric System features an elegant fabric top with a water-resistant laminated backing and a protective dark splash guard skirt Air vents help to reduce inside condensation and wind lofting Padded handles for easy fitting and removal Elastic hem cord for a tight and custom fit Click-close straps snap at front to secure cover on the windiest days