HIGH QUALITY MATERIAL: Our adirondack chair cushion is made of high quality polyester fiber, waterproof, stain resistant and UV fade resistant. It with good resilience and is not easy to deform, and resistant to shrinking and wrinkling. LARGER & THICKER DIMENSIONS: The size of this rocking chair cushion is 48" x 19.7" x 4.7". Which is 20% thicker and larger than the market Adirondack chair cushion. Chair cushions are generously filled with a soft polyester fiber to make this cushion more fluffy, will give you more support and comfort. NON-SLIP DESIGN: This patio chair cushion design design with long attached ties and one elastic back strap, better fix to the chair, makes it more stable and not slide easily.