This is a graviteezer. It helps you by having gravity when you have to walk by having gravity when you want to walk. If you are on board the ISS you need to practice walking a lot. Instead of having to put on a vest and attach rubber bands,you can slip to little u-shaped graviteezer at the heel and toe of both your shoes.Then you put the buckle which goes over your shoe. The cone on the buckle allows you to adjust tall it is. The nob on the graviteezer opens the magnet compartment and add more magnets to increase and decrease the gravity.