The Exoesqueleton

Its name is Muscle Suit, this object is 6 kg heavy, it was made by Koboyashi (Japan). When you press the button you can lift 20 or 30 kg easily, and this will protect your back zone. The exoesqueleton can let you lift more weight but the weight stretches your arms and you might not endure such a heavy weight. 

This invention was made for people with injuries or physical problems. It looks like a backpack because it is set on your back.