There is one very vital thing that a person needs to go into space, a space suit. The space suit creates an earth like environment inside the suit; it also allows for free mobility so the astronaut can complete missions.  Space suits have many functions for an astronaut while they are in space. The main things are that they provide a pressurized atmosphere for the astronaut; it is linked up to an oxygen tube so that the astronaut can breathe and also it regulates the temperature because in space it can get very cold (Freudenrich, 2007).
        In space there is a different atmosphere than on earth and our bodies are not adapted to the atmosphere. Modern space suits are pressurized to make it seem like you are still on earth. (Freudenrich, 2007) The space suit provides pressure to keep your inside liquid, or not allowing them to freeze. A space suit is like a bubble of air, the actual material is neoprene-coated fibers and a rubberized layer on the outside so that none of the air can get out. (Space Suit, 2007)
         In space there is an insufficient amount of oxygen so an astronaut needs to have an oxygen supply, it either comes from the ship in a cord that is attached to the astronaut’s suit or the astronaut has a backpack with an air reserve in it for him to breathe. (Freudenrich, 2007) An astronaut cannot breathe normal the normal air that we have on earth in space, normal air is made up of 78 percent nitrogen, 21 percent oxygen, and 1 percent other gases. In space an astronaut would not live if he got that air through the oxygen tube because not enough oxygen would get into the blood stream and to the heart, it is the same effect of what would happen if you climbed to the top of Mt. Everest but it would be worse. (Freudenrich, 2007) Space suits provide pure oxygen to the space suit so that the astronaut gets the air he needs. Since all the air in the space suit is trapped so is the carbon dioxide that the astronaut exhales, if he were to just leave it there the carbon dioxide levels would become deadly. On the backpack there is something called lithium hydroxide canisters, they are used to take the carbon dioxide out of the suit and stored until it can be released. (Space Suit, 2007)
        In space it can become very cold very fast; in order to cope with these temperatures the spacesuits are very heavily insulated with multiple layers and a sun reflective layer. Then there is the flip side to that where it can get very hot, if the heat is not removed the visor will fog up and the vision would be very poor. To solve this they use water cooled garments to keep the astronauts cool. (Freudenrich, 2007) In each space suit they need to hear their mission to know what they have to do, so each space suit is equipped with radio transmitters to communicate with ground controllers and with their crew members. The astronaut uses a headset to communicate with the others. (Space Suit, 2007)