I've traveled a few times with this bag but most recently used it to carry a compact mirrorless camera (Fujifilm S-X10) in addition to my wallet, sunglasses, packable rain jacket, and some other misc items. I was able to leave the camera with the lens (small 18-55mm) and lens hood on, while in its neoprene case with strap. I couldn't fit my water
...Read MoreRead more about I've traveled a few times with thisbottle in at the same time though due to the raincoat so I'd swap it with the camera when I was taking photos. Plus I didn't want water and a camera together! It would be perfect with an external water bottle pocket, but overall I'm amazed what I can fit in there. It never felt too heavy and was comfortable to wear all day. Plus way cuter than just a regular backpack if you're in town and not out hiking. Though I suppose you could hike with it. The locking zippers and other safety features gave me piece of mind to not think about the bag constantly in busy places. Read LessRead less about I've traveled a few times with this