I purchased this to use in conjunction with a larger backpack for use during a trip so that I have something smaller than a backpack to carry when necessary.  This is a pricey bag but it is very well made and a perfect size to use as a crossbody.  Contrary to other reviews, I don't find it too small for my intended use.  It is lightweight so won't strain the neck and back and will fit the day's essentials.  Not sure if it is waterproof but will do better with rain than a leather bag in any case.  I love it and am very happy I made the purchase.