The environment suit is designed to counteract the affects of zero pressure and oxygen in space while still allowing the astronaut a significant range of mobility and visibility to perform the tasks required to facilitate space travel. An environment suit must also remove carbon dioxide created by the astronaut and maintain a comfortable temperature despite the extreme shifts experience as the astronaut moves from sunlight to shade. If you ventured into space unprotected:

• You would become unconscious within 15 seconds because there is no oxygen.
• Your blood and body fluids would "boil" and then freeze because there is little or no air pressure.
• Your tissues ( skin , heart , other internal organs) would expand because of the boiling fluids.
• You would face extreme changes in temperature:
• sunlight : 248 degrees Fahrenheit / 120 degrees Celsius
• shade: -148 F / -100 C
• You would be exposed to various types of radiation , such as cosmic rays , and charged particles emitted from the sun
• You could be hit by small particles of dust or rock that move at high speeds ( micrometeoroids ) or orbiting debris from satellites or spacecraft.