is constructed with four layers of densified polyester fill, which helps retain the cushion’s shape after prolonged use. The material is a marine grade Sunbrella, which is mold and mildew-resistant and is treated with a resin that makes it water-repellent. The cushion secures the furniture with three sets of self-Velcro or ties depending on the lounger of your choice. We have dozens of standard sizes to fit your chairs.