I carry two kinds of OC, An ASP key defender and First Defense Foam. I have been Nailed by the key defender (windy day) and although it stung a bit, I have no dought that I would still be able to fight. As for the foam, I have not had to use on a BG but have gotten a good dose.I had my girlfriend spray my to see if it worked, and for copurt if it ever came up. The stuff was NASTY!!!!!!!!!
I seemed to burn for ever and could not be wiped away, plus it would spread everywere. Even if the OC did not work the foam will blind them, it has a 15 foot range and does not blow to bad in the wind.