【Ergonomic Design】-Designed with comfort in mind, this seat features a thick, high-density foam cushion that molds to your body for superior support. The contoured backrest and spacious seat reduce pressure, so you stay relaxed even during long hours of sitting. 【Flip-up Bolster Design】The innovative flip-up bolster adds extra height when needed, improving posture and visibility while standing. Perfect for moments when you need a stable, elevated position without sacrificing comfort. 【Sturdy & High Load-bearing】 The captain boat seat is constructed with rust-resistant aluminiumhinges and a heavy-duty plastic base, this seat handles up to 113.4 kg with ease. Durable materials ensure long-lasting performance, season after season. 【Weather-Resistant & Waterproof】Made with marine-grade vinyl, this seat resists water, UV rays, and wear. The smooth, easy-to-clean surface stays comfortable in all conditions, and the included waterproof cover adds extra protection when not in use. 【Easy to Install】-We provide detailed illustrated instructions to allow you to quickly complete the assembly. Including mounting screws and washers, easy to install on universal 5”X5” and 5”X12” mounting bolt patterns. (The base swivel joint is not included).