4S Heavy Duty Seat Suspensions & Mounting Systems
Engineered for comfort. Built to last.
4S heavy-duty seat suspensions and mounting products are crafted from premium marine-grade materials to deliver top-tier performance on the water. Designed with serious engineering and a deep understanding of real-world marine conditions, these products are far more than just accessories — they are essential tools for safer, more comfortable, and more enjoyable boating.
Whether you’re cruising calm waters or powering through waves, 4S’ systems reduce shock and vibration, helping to protect sensitive backs and necks from the harsh realities of life at sea. With 18 distinct product lines, we’re confident you’ll find the perfect solution for your vessel.
Unmatched price-to-quality ratio.
No gimmicks. No bouncing toys. Just performance.
Explore our range and discover how 4S seat suspensions and mounts enhance your experience and add value and style to your boat.