The ARCUS 240 BO is an ergonomic office chair designed for modern work environments, including corporate offices, coworking spaces, and educational institutions. This chair features a height-adjustable swivel mechanism, an upholstered seat, and a mesh backrest available in Theo Nets, Omega, or Rhythm fabrics. The black nylon frame and seat cover complement its sleek design. Equipped with SYAC synchronous mechanics, it offers automatic backrest resistance with adjustable force via a front rotary dial, allowing for initial position locking and three movement range settings. The chair includes a seat slide, a black 5-star nylon base, and 60 mm black castors. The basic model is without armrests but includes height-adjustable lumbar support. Designed by Martin Ballendat, the ARCUS chair is recognized for its distinctive arc and has received the Red Dot Design Award. Available in black and light grey, it can be customized with additional lumbar support or a headrest.