A multi-function office chair, Hydra provides you healthy comfort through every function: adjustable backrest, adjustable lumbar support, 3D-adjustable armrests, sliding seat and weight perception mechanism with 4 lockable positions.."Customized comfort" is the core value of Hydra. You can easily adjust every control which provides body support based on your own preference and demands. The excellent function makes Hydra be more humanlized and closer to your office life.