The SwissGear Travel Gear 1900 Scansmart Backpack offers a ton of room and plenty of pockets to put gear into. There’s two full length pockets, side pockets and two front mounted pockets, all of which can hold a lot of stuff! The backpack is made with durable, weather-resistant 1200D ballistic polyester to offer some weather resistance and the rigors and abuse of daily use as well. The backpack is designed to open up completely from the middle to lay flat on the belt so the scanners at the TSA checkpoint can easily see what’s inside. I like this feature because it means I don’t have to pull things out to put on the conveyor. The Backpack measures 18.5” X 13.5” X 9” (approx. 31 liters).