Flash Furniture - Ergonomic Mesh Office Chair - BlueLO Ergonomic Mesh Office Chair with 2 to 1 Synchro Tilt, Adjustable Headrest, Lumbar Support, and Adjustable Pivot Arms in Blue. High Back Design with Breathable Mesh Material. Curved Back with Built In Lumbar Support. 3 Position 2 to 1 Locking Synchro Tilt Adjustment tilts the back and seat in unison. Waterfall Seat reduces pressure on your legs Pneumatic Seat Height Adjustment. 5 Star Nylon Base with Dual Wheel Casters. 250 lbs. Weight Capacity