Flash Furniture Mid-Back Black Leather Multifunction Ergonomic Swivel Task Chair with Adjustable Arms Contemporary Task Chair Mid-Back Design Pillow Top Cushioned Seat and Back Triple Paddle Control Mechanism Back Height Adjustment Back Adjusts 2.75'' up and down Infinite-Locking Back Angle Adjustment 2-to-1 Synchro Tilt Adjustment Tilt Tension Adjustment Knob Waterfall Seat promotes healthy blood flow