Alera Etros Series Suspension Mesh Mid-Back Synchro Tilt Chair, Supports Up to 275 lb, 15.74" to 19.68" Seat Height, BlackMesh suspension seat and back provides firmness, breathability, and comfort. Adjustable lumbar support. Back reclines at 2 to 1 angle to the seat allowing user to recline while keeping seat relatively even with the floor. Height adjustable arms. Mesh suspension seat and back provides firmness, breathability, and comfort. Adjustable lumbar support. Back reclines at 2 to 1 angle to the seat allowing user to recline while keeping seat relatively even