Messenger Bag vs. Back Pack

[Eden]

I have used both messenger and back packs. I perfer backpacks and only because the messenger bag strap sets smack dab between my breast! I feel very exposed when the strap pushes my shirt down and outlines my breast. I get honked at as I ride.

I am currently looking at the timbuk2 backpack.

Those of us with A cups have plenty of room inbetween the girls for a strap ...... (and not much to outline either )