The SpinaliS Hacker is engineered for active sitting, a healthier approach to ergonomic seating that counters the risks of prolonged, static sitting. Its spring-mounted seat moves subtly with you, encouraging the micro-movements that engage your core, improve spinal alignment and reduce muscle tension. This helps prevent the fatigue and discomfort of static sitting, making the Hacker well suited to long hours at a desk.Fully adjustable, the Hacker adapts to you: the height-adjustable seat suits different desks and user heights, the backrest angle moves from upright, task-focused postures to a more reclined position, and the lumbar support encourages a natural curve in the lower back. That makes it a strong choice for both intensive office work and gaming.Built from high-quality, durable materials, the SpinaliS Hacker supports users up to 136 kg and pairs a sleek, modern look with hard-wearing upholstery that keeps its comfort and appearance over years of use.Specifications Small gas lift range: seat height 47 cm - 51 cm Medium gas lift range: seat height 50 cm - 60 cm Large gas lift range: seat height 52.5 cm - 62.9 cm User height: 152 cm - 193 cm (5'0" - 6'4") Body type: all Adjustable options: seat height, backrest and armrest height Seat dimensions: width 42 cm, depth 42 cm Maximum load: 136 kg Chair weight: 16.6 kg