Craft of polyester with waterproof membrane, this cushion passes tests for fade resistance, reliably withstanding daily sunlight exposuring and light to moderate rain Designed with firm foam padding in both seat and backrest, this cushion maintain shape and prevents sagging even with frequent use, offering long time comfortable for resorts, hotels, or home lounging The portable size four section designs adapts to human curves and fis most curved / folding chairs, enhancing relaxation on balconies, vacations, or outdoor activity This outdoor thicken seat cushion features simple assembly with fully removable covers using hide zippers for machine washing Compressed cushions regain shape within 24 48 hours naturally or faster with a hairdryer, ensuring long time reuse convenience for patios, lawns, and pools Six adjustable straps keep the cushion firmly anchored to most recliners, shifting or sliding during use on sunbeds by poolsides or garden chairs