Paired this with Eagle Creek No Matter What Flatbed Duffel 20 for carry-on rig for overseas travel. Slips on and off handle of suitcase so you can roll along with both at once and not have to wear it, which is great if you're standing in line for customs or a flight or tossing the entire rig into a bus or taxi. XTA pack itself is amazingly well organized. Top pocket has inside pockets that hold all your smalls that you need all the time. Main compartment is big enough to hold my rain shell and fleece jacket and a hat and other stuff (and I'm a 3xl tall, so that's saying something). Straps are comfortable and reinforced bottom is a good idea. After being shoved under airline seats, thrown around in busses and taxis, and generally used and abused, it shows no signs of wear. At first I didn't think the small size would accommodate everything, but it's so well engineered that it did all I asked and more. Also holds two water bottles in mesh side compartments. This will ride with me whenever I travel in the future. But hey - it's Eagle Creek, so you should count on that, right?