The Passive Elastic Suit-Back (PES-B) is engineered with an original S-shaped mechanical architecture that delivers continuous, real-time reactive force to the lower back. Designed for workers who face long hours of heavy lifting, frequent bending, or repetitive stretching, the PES-B intelligently disperses pressure across the waist, alleviates muscle fatigue, and provides stable, balanced support throughout physically demanding tasks. Whether leaning forward or backward, its unique mechanism counteracts stress on the lumbar vertebrae, preventing excessive strain while maintaining natural posture and mobility. Built to be forklift-friendly, the PES-B integrates seamlessly into warehouse and industrial settings, ensuring unrestricted use alongside material-handling equipment. By reducing the risk of work-related back injuries, improving comfort during extended operations, and enhancing overall efficiency, the PES-B helps employers protect their workforce and empowers individuals to perform at their best—making every movement easier, safer, and more sustainable over time.