Vintage long rectangular bench cushion

Vintage lengthy rectangular tufted cushion ⭐️ pretty cool / rare find ! I found this at an estate sale many years ago but I was never able to find out exactly what it’s meant for ? 🤷‍♀️ If your reading this and possibly know what it’s for I would be so grateful if you could leave a message below 😊 🙏 It feels like the material used for outdoor cushions and has some thickness , weight and is definitely more durable compared w an indoor cushion It’s can’t be a blanket or a spread , it’s cushiony and material is a bit course and wouldn’t be soft & cozy . It definitely from atleast 1980s but appears brand new and in excellent well cared for clean condition The main side is a light yellow w dark green & white plaid design One side is tufted & all white Measures 100” / 36”