Mars Spacesuits
http://space.com/businesstechnology/technology/spacesuit_sensors_010827-2.html
For those bbs denizens skeptical of Mars suits weighing under 200LBS.
Also David Clark the spacesuit mfg has had a 26 LB proto (suit only, no O2 tanks) in the works since '99. Early stages, but hey, we ain't goin' to Mars anytime in the next 2 decades so there's plenty of time for even more advanced materials & biosensors to be developed.
-philw