Pacsafe Z-28 The Heritage Collection Anti-Theft Urban Backpack 

"I bought this bag because I was making my first overseas trip and wanted some peace of mind about my belongings. I had already purchased a Pacsafe chain wallet a few months earlier and really liked it so I checked out their bags. This was the newest and manliest bag they had available, no reviews when I bought it so I took a chance... turned out great for me. I like this bag because it does not look overly sporty or military. This bag has a sleeve inside with two compartments for an iPad and a smaller item like a Kindle. There are also two zippered compartments on the top flap for items that you need to get to quickly, one is inside and the other is on the outside (I didn't keep anything valuable in either). This bag was very comfortable to wear even when loaded to the top, I didn't use the chest and waist straps. There is no organization inside, just a large open space which works great for me because I organize my items in packing cubes and stack them based on how often I'll use the items in them. My previous backpack had lots of organization pockets and spaces but it really didn't hold very much. This bag is like a warehouse for your travel goods, best of all you can lock up your more valuable items and leave them in the hotel room even if there is no safe provided by the hotel. I walked through quite a bit of rain without getting anything inside the bag wet. I cannot think of a backpack that I have had that I like more than this one, I would definitely buy one of these if you plan on traveling a lot or have to be able to lock up your belongings on the go(I even locked the bag to the bars on the train when I knew I was going to fall asleep for a while, no worries about waking up missing any items). I would definitely purchase this bag again but it seems so durable that I do not think I will have the need to, might buy one as a gift now that I think about it."