Remember too that if you're anticipating use over/in water, that you'll want one of the floating models. Either the current ResQFix (which I think is just a MicrOFix with the float pouch) or the newly announced ResQFix12 or AquaFix.

My MicrOFix is clearly labeled on the back that it will NOT float by itself. Which is fine for my usage, but not appropriate for marine use.