Vacc Suits

First a word about the term. The name vacc suit for an EVA suit aka spacesuit was first used in the game Traveller. Loren K. Wiseman has stated that Mark Miller, the developer of Traveller used the term for coryright reasons. Despite this it has become a common term in space science fiction RPGs, including GURPS.
Within the Highlands, and in other regions where the TL is high enough, vacc suits use a set of similar technologies. Such suits do not inflate, they use a mechanical counter-pressure system (MCP) which uses nano-materials to form an elastic bodysuit which provides pressure for the body not by keeping it within a pressurized bubble, but with direct mechanical pressure. Open pours in the suit allow perspiration to aid in cooling. Tears in the suit can cause bruising to the skin beneath, but are not catastrophic, as they are in a conventional suit.
The MCP suit forms the basis of all advanced vacc suits, even cybersuits.
The most basic vacc suit is the skin suit. In this design the MCP system is stabilized and enhanced by a network of active smart metal which can give extra support to the suit and pull it tighter against the skin when external pressure decreases. Skin suits resemble a body stocking. The outer layer is often made of chameleon surface to allow the suit to be decorated, which it typically is by most spacers. It is often worn as everyday clothing by everyone from lorry drivers to Rangers. Skin suits have minimum radiation protection and are not intended for heavy EVA work. They are what is technically called an IVA (intravehicular activity) suit. The better ones include the ability to extrude a helmet and gloves. These luxury brand units typically include other features, like extruding hoods for cold weather environments, and some even include light ballistic armor. Cheaper ones require the use of a flexible space helmet and gloves, which may be kept in a pocket, or a standard bubble helmet, both of which require separate communication gear. Skin suits are designed as emergency life support suits. Most have a re-breather pack and a mini tank which gives 30 minutes of air. They also have an external connection to allow use with a small tank giving 12 hours of air or a fixed system for virtually unlimited air.
A standard EVA vacc suit is heavier and includes a layer designed for radiation protection. The better ones include lots of pockets for equipment storage, and hooks for lifelines and other equipment. The suit has a hardpoint in the back for mounting a life support pack, which provides power, temperature control and a place to mount air tanks. Serious suits include an installed waste relief system, illumination lighting, multivisor sensor system, gravity boots, and a concentrated food and water system. It may also include a B/G propulsion unit, for enhanced space and planetary maneuverability. All suits will include a radio communication system with a hardline option and a computer support system, typically in the helmet.
An armored version of the suit is available, which has a flexible ballistic outer coating. An even heavier combat hardsuit is used by the military for low intensity conflicts which do not warrant the use of cybersuits or warsuits. They contain all of the above features as well as a bio-monitoring web and more advanced sensors.