Self-contained breathing apparatus

A self-contained breathing apparatus (SCBA) is a special type of breathing equipment that someone can wear on their back like a backpack. It helps people breathe in situations where the air around them is not safe to breathe, like if there is smoke or dangerous gases in the air.

The SCBA has a tank filled with clean air that is attached to a mask people can put on their face to breathe. The air tank is heavy, so it has straps that go around your shoulders to help you carry it. The tank also has a valve that you can turn to start the flow of air.

The mask on the SCBA covers your nose and mouth, and it has a clear shield so you can see where you're going. It's important to make sure that the mask fits snugly over your face so that no bad air gets in.

People who use SCBA are usually firefighters, scuba divers, or people who work in dangerous environments where there is a risk of breathing in harmful chemicals or gases. It helps keep them safe so they can do their job without getting hurt.