Could there not be a fiber optic cloak built to bend light around a target? When I hear light distortion fields, I immediately think Halo. However, the Tom Clancy Future Soldier route could work as well.
On top of that, but there is the SPI system where the plates would mimic the surroundings like a chameleon, so it also was far from perfect but so long as you followed the rules of not being seen, you would be fine.
Does anything like this exist? Otherwise, could it be made?