Alera Mota Series Big And Tall Chair, Supports Up To 450 Lb, 19.68" To 23.22" Seat Height, Black Generously padded contoured seating ideal for the big and tall user. Reinforced seating structure and steel base for maximum reliable support. Enhanced padding and fabrics for extra support all-day long. Height-adjustable, soft-padded, T-arms for optimal arm positioning. Waterfall seat edge reduces pressure points at the back of the knees.