I travel frequently internationally and this bag is the perfect companion to my carry-on. There are many nooks and crannies for little, medium, and large things. From a spot for a pen to another for your phone, cables, wallet, passport, ...etc.It fits perfectly around my shoulder and I could carry it everywhere on my trips. The weight is excellent and the space is just right. I also love the easy-to-open and lock mechanism.I also have the smaller size (10L, I believe); which is configured differently but I was always looking for a little more space to fit everything. This is the perfect size. The quality is amazing and the fact that it's waterproof is comforting.It also has a pocket in the back so you can slide it over a carry-on handle for easy navigation through an airport. They thought of everything!