I don't go anywhere without a Buff. Seriously, I always carry one in my EDC.

As to a 'stocking cap' or 'knit cap'. I have my military issue, balaclava and a few others. I got a Miller Lite cap at a superbowl party in Vegas. They all come in handy and one goes in my travel bags.

A word of advice for the guys, stay away from the ones with any pom pom balls on top or pig tails to tie under your chin.