This leg brace is for helping astronauts with different gravity situations going from Earth, to Space, to Mars. While astronauts experience different gravity from Space to Mars this brace could help with getting used to the different forces of gravity. This design was meant to be easy to piece together. You can also increase the size of the brace by printing more pieces. All you need for the brace is a few straps to keep it in place on your leg. Put the smallest part into the part with a hole using the clicking function into the square right by the large hole. Then put the part with the cylinder through the one with a hole and the smallest piece. Then you can attach the last piece onto either side of the brace and your done.