The results show that the environmental impact of the 3D printing process is smaller than the traditional manufacturing process in view of the material, distribution and use phases. The research team pointed out that the length of printing needed by the insole is closely related to the environmental impact. The 3D printer is different and the printing time varies greatly. Therefore, the study pointed out, "if you want to reduce the environmental impact of 3D print pads, reduce print time, use better 3D printers, and select the best energy sources."". The study concluded that the 3D printing process itself is one of the most environmentally influential factors.