This chair has a tilt in space folding frame. The seat system is removed in order to fold the chair. The seat has a mildly contoured seat base and backrest, and a low profile headrest. There is a pelvic strap that is designed to prevent the user from opening the buckle and requires a pen like tool to open it. The chair doesn’t have lateral trunk support pads or and anterior trunk support strap. The chair has transit tie down brackets on the frame. The rear wheels are 12″.