Space suit
Space suits keep the wearer warm and shielded from radiation and vacuum, useful when performing EVA. They also typically offer the wearer some form of maneuverability in the zero-G environment of space, but give little protection against weapons.
Common features
There are many types of space suits designed for specialized tasks, but they all share some of the same features. They all provide structural integrity in total vacuum and provide atmospherics and temperature regulation to some degree, creating a localized habitable zone in the harsh vacuum of space. Furthermore, all space suits are designed to take care of certain bodily functions more or less conveniently, including eating, drinking and excreting.
Types of space suits
The basic civilian shipboard space suit is used only for EVA and in emergencies. It is not designed for long term use, and often has only minimal food and drinking facilities.
Combat Vacuum Suits are designed to maximize both mobility and protection for the wearer, often including augmented mobility as they are usually armored. They are also designed for more intense, short periods of use, rather than as extended wear suits.
Fighter pilot space suits often have built in inertial damping to help the pilot withstand the stress of high G maneuvers.