Leader Accessories Kayak Seats Paddle Board Seat Universal Padded Canoe SUP Seat with Back Support - Deluxe Kayak Chair Seat Cushion with Storage Bag

Had that exact kayak and the seats are rubbish. Highly suggest getting a better non-inflatable seat from Amazon. You can search "kayak seats" and choose one, but here's the one I got which works great. https://a.co/d/0aXv64yU