What kind of suits do astronauts wear during spacewalks, and why?

Astronauts wear a special suit called an Extravehicular Mobility Unit (EMU) during spacewalks. This suit acts like a small spaceship that protects them from the dangers of space. It provides oxygen to breathe, removes carbon dioxide, and keeps the body at a safe temperature. The suit also has layers to protect against radiation and tiny space particles. Astronauts wear helmets with visors that block sunlight and radios to talk with teammates. The gloves are strong but flexible for handling tools. Each suit is custom-fitted and weighs about 130 kilograms on Earth, though it feels weightless in space.