Originally Posted by
fuzz2050
How often to you ride in the rain? Honestly. If you spend a substantial amount of time in downpours, then the roll top is best, but until you move to portland, the flap will work well enough. Fog won't get past the flap.
I have a Timbuk2 Messenger M (the most basic one) and I have ridden through several downpours (my city gets approximately 1500mm of yearly precipitation). Never had a single drop of rain penetrate the inside of the bag.