IR would be an interference with the "camo" to prevent damaging radiation leakage to a human of close proximal distance. It would be for safety in less than 10ft-20ft, or so?
technology is amazing, not perfect. Think about what "light" is, radiation. Radiation in a narrow band we call "visible light", but radiation, none the less. How much radiation is needed to effectively bend light? What if the light needed to be "phased" with a type of flux at a rate of faster than 24-frames (or so) per second - could we see it? Would they need to diffuse 1000-frames per second or just about 50 or so? To be a perfect bend on light, imagine the issues which could arise. It is not a "TV" screen, this suit can bend around matter as well. - you can hit it and it will go though. (energy)
camo and mass diffusion. lots of energy.
to tell the truth, you would be gifted if they let you touch them, or try to hurt them. I keep thinking of ancient stories to write about when people were instantly burned alive for even trying to "up-right" the Arc of Moses. (washing)
[video=youtube;wtC744jVWmE]http://www.youtube.com/watch?v=wtC744jVWmE[/video]