Added to the core values of the original Curve, including the structural simplicity, the ergonomic optimization and of course the head turning looks, Curve Plus offers an upgraded mechanism and 4-Direction adjustable armrest. The new mechanism features a horizontally mounted spring which redefines the back support and synchronous reclining experience. The highly reliable mechanism features a side tension adjuster which allows reclining tension a breeze while being fully seated. Curve Plus added functionality now gives even better ergonomics customization.