The ALVA 330-SYS is an ergonomic office chair designed for modern work environments, including corporate offices, coworking spaces, and educational institutions. This height-adjustable swivel chair features a fully upholstered seat and high backrest, crafted from injected foam for enhanced comfort during long hours. The chair's modular design includes a height-adjustable backrest available in two sizes, with optional air lumbar support and headrest to cater to individual preferences. Its black 5-star nylon base and black carpet castors (Ø 60 mm) ensure stability and mobility. The SYS synchronous mechanism, with lateral backrest tension adjustment and five locking positions, supports a collaborative workspace setup. This versatile piece complements modern office desks and adjustable height desks, making it a valuable addition to any modular workstation furniture collection.