Flash Furniture Mid-Back Black Mesh Multifunction Swivel Task Chair with Adjustable Arms Contemporary Task Chair Mid-Back Design Flexible Mesh Back Material Built-In Lumbar Support Triple Paddle Control Mechanism Infinite-Locking Back Angle Adjustment Multi-Tilt Lock Mechanism Tilt Tension Adjustment Knob Padded Black Mesh Upholstered Seat Waterfall Seat promotes healthy blood flow