2" H x 40" W x 17" D Indoor/Outdoor Sunbrella Bench Cushion (DC85)

Canvas charcoal with removable and reversible cover. Also includes attached ties on both rear corners. 

https://www.wayfair.com/furniture/pdx/breakwater-bay-indooroutdoor-sunbrella-bench-cushion-bkwt6103.html?piid=28143619%2C28143626