Wise 8WD125FF Flip-Flop Pontoon Seat Cushion Only; Seat Base Sold Separately to Complete the Pontoon Seat. Features High Impact Rotational Molded Plastic Base. Injection Molded Plastic Seat Frame System. 28oz. Marine Grade vinyl with UV and Mildew Inhibitors. High Compression Virgin Foam Padding. Aluminum and Stainless Steel Hardware. Easy Assembly. 6 Warranty Frame System, 3 Year Warranty Upholstery.