A spacesuit is protective gear that protects an astronaut from the hostile environment of extremely low pressure, low temperature and radiation in space. It is made up of several layers of strong synthetic materials including Teflon and nylon which shield the astronauts from tiny particles called micrometeoroids. The intense solar radiation is reflected by a white plastic layer which has a metallic coating.
The interior of the suit is pressurized but for which the astronaut’s blood would boil off in the vacuum of space.
A backpack carries water both for drinking as well as to keep the astronaut cool. Water flows through pipes in the astronaut’s suit and carries away body heat.
The spacesuit also carries a two-way communication system to enable the astronaut communicate in the vacuum of space.