I have an illuminite jacket. It doesn't breath well at all but I haven't found
anything that really does when you are sweating as much as we do when we
are riding really hard. I could never wear it in the summer but in the spring,
fall and as an outer layer in the winter it does a good job. Sometimes I have
to open the front to get enough air flowing in.

However being seen for me is more important than anything else so I am willing
to put up with the lack of breathability. It isn't that the illuminite is
brighter than anything else it is that it lets everyone see your outline so they
know it is a person.

It is definitely not the miracle it is advertised to be but I think cars see me
much better and that is my main concern.

Steve