Design: High-density foam cushioning for exceptional comfort and support, The frame of this chair is constructed with solid plywood, which is very sturdy and will not crack easily. Function: 360 degree swiveling living room chair, height adjustable 4-point aluminum base with painting finish office chair for home or business use. Criss cross chair for office 90-110 degree tilt angle provides you an optimized position, you can adjust the tilt tension with the black round knob under the seat.