Never thought about this actually... but I've been caught in the rain while using the regimen and it didn't cause any problems for me. But it makes sense to keep an umbrella with you if you're worried about this

Unfortunately I'm a paramedic and usually don't have a spare hand for an umbrella...and I'm out in the rain for extended periods.

Oh ok

so I guess holding anything (a folder even) to shield the rain wouldn't be an option either... Have you actually had issues with rain making BP run and bleach clothing? Like I said before, I haven't had that problem myself so I don't know what else to suggest