My own thoughts...

Excellent read on the PLSS. My thoughts are to create two types of space suits.

1. Gas-Based: These are not much different than today's space suits, where the pressure is maintained by a mix of gas, and a more-streamlined-but-still-kinda-bulky PLSS on the back. The helmet is bulb-ish. These are "economy" models, suited for common laborers, and don't require special fitting.

2. Elastic-Based: These are the special fitted space suits for elites such as special forces, high-ranking officials, etc. The idea is to maintain variable elasticity using piezoelectric technology, where thousands of small piezoelectric transducers are arranged within the belt, ankles, and wrist modules, and areas of the upper torso, pulling on cords that are weaved through a web of material, thereby applying the necessary pressure to survive in space. The only gas-based area is the helmet, where pressure is sustained though a mix of oxygen and helium, or whatever The PLSS is much more streamlined than the Gas-Based models, and an arm navigation/control unit is attached to the left or right arm with. Gloves are tactile, and the overall suit is form-fitting. The Elastic space suit automatically adjusts the pressure using electricity, and therefore requires a larger energy module than the gas-based suit.

There are two kinds of Elastic-Based suits: Civilian and Military. Civilian has light armoring to sustain minor damages, and has only a barebones emergency pressurization system. Military has a dense armor coating in the form of a flexible piezoelectric alloy that activates and hardens in localized areas when an impact is made. Underneath is a more reliable emergency pressurization system.

All of these suits address the thermal problem by having a layer of insulation where the inside has a web of thermal fiber that converts electricity to heat. As for venting/protecting heat, perhaps the other fibers in the insulation can draw heat out of the inside layer. The insulation I suppose can also protect against radiation to a certain degree, or another layer can be introduced. I'm sure by the 22nd century, nuclear advances in technology would also include advances in dealing with radiation, and that tech would influence its design.

Basically, the elastic model is based on micro-fiber technology.

Anyways, that's all conceptual textual mumbo-jumbo. Ideas and suggestions? I'll be tackling these two suits soon, make some concepts, and start on the models, assuming the designs are feasible for the future.

NASA Specs for the Portable Life-Support System

http://www.hq.nasa.gov/alsj/plss.html

Any spacesuit needs PLSS, and needs to be useful/practical. I say learn from the pros, then streamline.
(Pics at site)

Spacesuit Design

Spacesuit design by Crudelia von Grimm.

Ideas for Jenna

I made two concepts for Jenna. One is a classic suit, the other is a mix of classic and futuristic sci-fi suit. The colours can be changed, as certain details.
As for the green suit I was inspired also by old diving suits as from the movie Abyss. It isn't as huge as the other one, leaves more freedom to move around which might be important for Jenna and her work.

Idea for Carpenter

I made another idea for a space suit, this time the number 2. I was inspired by several sci-fi suits in games. I also thought about a few logos for CEO (they are at the left side, anyone who can design with Illustrator is welcome to make a proper logo).

Thoughts on suit design

The current cutting edge suit design involves using elasticity to maintain pressure, rather than pressurising the suit with gas. This article has some interesting information on this: http://spacewardbound.nasa.gov/australia2009/docs/Waldie%202005%20MCP-Paper.pdf

In a nutshell, the suit itself is similar to a wetsuit. Its inherent elasticity squeezes the occupant, simulating atmospheric pressure without the bulkiness of traditional pressurised suits. The helmet is of the conventional pressurised design, but as its volume is significantly smaller than a traditional suit its pressurisation system (backpack) need not be as bulky. Another huge advantage of the elastic suit concept is that a tear will not cause catastrophic failure, only local vacuum & freezing wounds.

One problem inherent in the design is getting into it; its tightness makes it very difficult to suit up. Suggested possibilities are to use materials capable of changing shape, such as electro polymers. These could be formed into the suit as ribs or spars, which could distort and stretch the suit open at the flick of a switch, and could even be continuously variable to maintain pressure at any external pressure, meaning the suit could still be comfortable inside the base. Heating will obviously be important, integrated heating tubes could be visible in Jenna's suit and the Giyomes' suits, much like the cooling tubes in the Apollo under-suits.

This elastic design allows the suit to be form fitting, which should be significantly easier for the wardrobe department to simulate than a traditional suit, and represents 'good science' for the purists. Carpenter's suit could actually have essentially the same design, but with a black 'exo-skeleton' with integral life support etc. The Giyomes suit could potentially follow the same basic concept, but perhaps with external elastic straps, causing the fabric to bunch in an uncomfortable-looking way.

Wardrobe design is definitely not my area, the above is just some initial conceptual ideas. I'm happy to have a go at designing something but I am sure there are others with far better skills.