PREMIUM FABRIC: Adirondack Chair cushions are made of heavy-duty outdoor polyester fabric that is waterproof, stain resistant and fade resistant. And easy to clean, just cleaning with a clean mild warm wet towel. COMFORT AND SOFT: Our patio chair cushions are generously filled with high quality memory foam block and PP cotton. The foam block can support the whole body and PP cotton can provide more comfort. Provides a relaxing effect for you. NON-SLIP DESIGN: The outdoor seat cushion designed with one back strap with snap and 10 side straps, and under the cushion has granular non-slip bottom, which makes this outdoor chair cushion more stable and not slide easily.