If you're a frequent traveler, then you've realized by now that your average backpack isn't terribly airport-friendly. By contrast, this one from Aer is built specifically to fit international carry-on requirements and still has a compartmentalized interior layout to keep your gear organized and easily accessible. The exterior is constructed from super-tough 900DÂ eco-dyed polyester and features multiple access points, including a full-clamshell opening to the main compartment, a ventilated shoe compartment (fits up to a men's size 13), and a small quick-access top pocket. It even has a side-mounted expandable water bottle, padded back panel and shoulder straps, and a rigid internal structure to keep your gear safe in transit.