Iron Man built a high-tech metal suit that made him invincible. Real ones exist, called ‘powered exoskeletons’.
It’s like wearing a robot. They sense every tiny movement of the wearer. The robot suit then instantly copies or magnifies them.
They help people who are paralysed to walk again, and allow people to carry heavy loads. Flying like Iron Man is still a bit tricky though.
Superhero powers: super-strength