The angle between the backrest and the seat can be changed to allow the user change from a sitting position to a reclining position, while the seat stays in the same place, this way to lie down is just the same as the seat of the car. Users who have back discomfort or postural hypotension after sitting for a long time are all recommended to lie down for a rest, the maximum angle is up to 170 degrees. But it has a disadvantage, because the axle of the wheelchair and the user’s body bending axle are in different positions, user will slip and need to adjust the position after lying down.