This cushion bag is made from high quality PVC backed polyester materials that offer it a high level of defence from most environmental dangers. The full UV protection integrated into the bag will mean that the bag does not degrade over time and no harmful UV rays will affect the heater beneath. Completely waterproof and all weather resistant this bag will protect your cushions from harsh rain and wind throughout the year’s seasons. The draw string bottom and integrated cord lock will offer an even higher level of security preventing winds and wildlife from reaching your cushions. The cover is easily cleaned through simply wiping it down and storing it securely. For best care do not leave cushion bag outside.