The exterior dimensions match the airline’s maximum allowable size for carry-on luggage making this the optimal bag for adventure travelers who prefer airport efficiency. External and internal compression straps add extra stability when ferrying heavy loads. The OZONE 46L/22” has an injection molded high clearance ABS base with foot bar for durable backbone and large wheels with sealed bearings for a smooth ride. “This is the best carry-on piece that I have every owned!” one review on Amazon says.