Not waterproof, though quite water resistant is the Crumpler Famous Wine Bar. I have the smaller version and it is a great bike backpack. It sits in such a way on your back as to not impede shoulder checking, and is very comfortable. One large main pocket with an internal pocket good for folders etc, and two large zippered external pockets. Wide anatomic should straps with removable waist belt and sternum strap. I love mine. If waterproofing was of major importance to me I would use this same bag and get a couple of dry bags / stuff sacks for inside.