Synchro-tilting mechanism allows users to independently and infinitely adjust their chair back angle to suit their individual body shape and working preferences. Outside back of chair is extremely strong and durable as it is made from fiberglass reinforced Nylon. Sophisticated synchronized tilter allows the seat and back to open up as the chair is tilted to the rear. Features include: height and width adjustable arms, sliding and articulating arm caps, sliding seat depth, lumbar height adjustment, side activated tilt tension and different base options.