Nylon Imported Making Long Sedentary Rowing Comfortable: Upgraded thick EVA foam sandwich construction of this kayak seat conforms to your hips, keeping you off the wet deck for all-day comfort A Lifesaver for the Back: This kayak seats with back support features a high-density PE backboard with ergonomic contour, providing solid lumbar support for every powerful stroke Quick Setup, Secure Fit: The BRANTMAKER paddle board seat comes with 4 heavy-duty metal clips(Load capacity: 330lbs) and hook-and-loop fasteners for tool-free installation; The front and back adjustable straps allow you to adjust the back support and comfort, ensuring a stable Durable Design for Water Exploration: The SUP seat features reinforced stitching and high-strength nylon webbing for long-lasting stability; includes a large splash-resistant storage bag Comfort that Supports Every Journey: The kayak replacement seat features a universal design, making it a great way to refresh your old boat. It is compatible with most inflatable kayaks, sit-on-top kayaks, tandem kayaks, sups, and more