It is a lift chair constructed from aluminum alloy. Designed by Fabio, the folding climber chair benefits from having folding armrests and adjustable footrests. This specially designed stair wheelchair matches any stairs exposed to the elements, such as gardens or cellars, or any other outdoor location. 1. Electronic brake automatically locks tracks during stops when climbing up or down the stairs, avoiding the chair slide down to lead to injury and providing the maximum safety. 2. The lock on the wheelchair can automatically engage when the chair is unfolded, so the unrolled frame is very steady to use. 3. PVC cushion, easy to clean. When there are stains, it is ok to clean just with a wet cloth. Discount Manual Stair Lift website:http://www.fabiomedical.com/stair-climbing-wheelchair/manual-stair-lift/