Straitjacket

A straitjacket is like a really strong and tight shirt that goes all the way around your arms and your body. It's made of special materials that are hard to rip or break. People wear straitjackets if they might hurt themselves or someone else. The straitjacket keeps their arms close to their body so they can't move them around too much. It's like a really strong hug that doesn't let go until it's safe. Some people might feel scared or uncomfortable wearing a straitjacket, but it's used to keep them safe until they feel better.