This is another Travelon anti-theft bag I own (the other one is a smaller travel bag). It comes in very handy, especially in a crowded area. The bag has a lot of locks. (You can choose to use them or not.) Each side has pocket - one side has zipper (but no lock), and the other side is just opened (good for maps or drink). As other reviewers have noted, the top opening is rather small, but I can still put folders inside (where there is a pocket to hold them in place) and have no problems taking them out (unless the folders are bulky, in which case, you may need to wiggle a bit). Very roomy all around, as well as very well organized. The straps are cut-proof (it has metal insert) and it's theft-proof (with many locks) but the bag is surprisingly light. For the price of a regular backpack, its a great product. Highly recommended!