Comment by jacquesm

The tricky spots are the front top where the cables run over the top of the pack, that's a perfect spot for water to seep in and at the very bottom where the spray from the wheels hits the bottom of the pack. Once it's properly sealed that won't be an issue though, but in this experimental phase I'm eyeing the skies carefully before a ride to make sure I won't end up being drenched. A couple of spatters it will definitely survive but a full-on Dutch-dunking could well be problematic.