2" H x 57" W x 16" D Indoor/Outdoor Sunbrella Bench Cushion (DC64)

Black bench cushion with a reversible and removable cover that also includes attached ties on both rear corners. 

https://www.wayfair.com/furniture/pdx/breakwater-bay-indooroutdoor-sunbrella-bench-cushion-bkwt6103.html?piid=28143621%2C28143635