SWALK-S1 made by Huizhou city SWALK technology co.,Ltd. It is a kind prosthetics totally OEM by ourselves,special for amputee customized. This kind Prosthetics light and strong,because it all made by Aluminum and Stainless steel , Total weight only 978 g. Except waterproof function,and consider Simulate the movement of the human knee joint,and long performance life in different environment.