Attwood High-Back Folding Boat Seat

From the Amazon Listing

• Ergonomically Certified High-Back Design：Designed with a high back and a thickened seat cushion that perfectly fits your body curve to help you relax your back and provides lumbar support during long fishing trips.The thick sponge padded seat cushion with high resilience offers you a comfortable sitting experience.
• Materials: Engineered with marine grade vinyl, anodized aluminum hinges and high-density slow-rebound foam to withstand sun, heat, rain and saltwater corrosion, and general wear, ensuring long-lasting performance.
• Boat Seat Dimension: 21.5''H x 17.5''W x 17.3''D fits most fishing boats and center consoles. The stable injection-molded plastic frame endows this folding boat seat with a strong loading capacity of up to 250 lbs.
• Excellent Durability and Stability: Reinforced aluminum alloy hinges and impact-resistant polymer frame prevent rust and cracking, making it capable of standing up to the shock of great waves, while allowing the backrest to be flipped down. Heavy-duty marine-grade vinyl withstands saltwater exposure, coupled with high-density slow-rebound foam that maintains shape for years.
• Quick-install Design: Compatible with standard 5" x 5" mounting bolt patterns. Includes rust-proof screw hardwares. Note: Swivel and pedestal are not included. You can smoothly flip up the backrest to enjoy a comfortable seat when in need, and fold it down to create more space when not in use.