This bag is not only awesome in the winter for quick trips where you need your gear to stay dry but is great in the summer for rafting excursions.
I was introduced to his particular bag from a friend who's career is in the US Army. I can attest to this bag's furious appetite of devouring anything and everything you try to stuff into it. The only complication you will have at the end is if you can actually carry the darn thing.
like a potato - tis the best shape. love this bag