Wise wood-frame lounge & jump seats are constructed of durable treated plywood with aluminum hinges. Polyurethane foam padding is covered with rugged marine grad vinyl upholstery which is mildew resistant and UV-treated to withstand fading. All vinyl covers are sewn with Dacron thread and upholstered with rust-resistant staples. Jump Seat must rest against the transom in the rear of the boat, do not use as a free-standing seat. Two-year warranty on both frame and upholstery!