I'm a total commuting novice (bike or otherwise!). I'm looking for a backpack that could occasionally take a 15" macbook and have some waterproofing.
Other than that it needs to acommodate a change of clothes and lunch... and snacks... and maybe a school book or two, I'm off back to university
I'm not really after any gravity-defying, quasi-elasto-steel, hydro-repellant space neo-fibers. Something reliable and reasonably priced would be grand.