Our Adirondack Chair Cushion is filled with 2 inches of luxurious poly Fill, covered with a soft-faced cotton canvas. Edges are reinforced, and tie downs keep the cushion properly positioned at all times., Soft Face Cotton Canvas with Cushion Tie Downs, Filled with Hi Density Luxurious Poly-Fil, Tie-Downs Keep Cushion Snugly In Place, Compatible with our AA21 Adirondack Chair (sold separately), Seat size 21w x 20d x 2h | Back Size: 18w x 2d x 31h