How about that foil tape that's used for taping Reflectix multi-layer insulation? It may be what Bounty is talking about.

It sticks, I THINK it's waterproof, and it's shiny. But I don't think it's restickable (it's hard to be really sticky & restickable). It will stick very well to most slick surfaces, but I don't know about fabric (can't try it -- I'm out).

It doesn't glow in the dark, but if you covered your hat with it, you would reflect light, and you might even turn into a blip on radar! <img src="/images/graemlins/laugh.gif" alt="" />

Sue