Whatever bag I have in my hand. I have one black leather coach bag and I have used it in the rain.. not a big deal. The rest are signature fabric so i'm not worried other then when it gets salty out( on the car) from the roads.. Just getting in and out of the car with those i'd have to be careful.. with the leather it will just wipe clean.
Lately I've been using my patent bags like my cobalt Maggie and cranberry Mia Maggie. It's so nice to be able to have a beautiful bag that you don't have to worry about in the nasty weather. This comes in very handy in New England!