I bought this for the bicycle design.  The bag is a thick cotton-like material.  There are several pockets with multiple theft-prevention type zipper (design) to close.  I like all the nooks and crannies to put your stuff that doesn't bulk out the bag.  I'm using it for a purse right now.  I doubt I would carry this on a long hike, but in general I don't like carrying anything across my shoulders for long durations so that is a personal thing.