A best-selling Osprey travel bag! In its standard configuration, the Transporter Hardside Hybrid has a 36-liter capacity and meets the carry-on requirements of many airlines. Between flights, you can expand it for an additional 5 liters by opening a zipper. - Four-wheel design - Sturdy metal frame structure - Polycarbonate shells and a very strong front panel made from 450-denier polyester fabric (PU-coated) - Telescopic handle allows the bag to be moved on either two or four wheels - 10 YKK zippers, with holes in the main zipper pulls for a separately purchased mini lock - Top and side carry handles - Smooth-rolling 70 mm wheels - Large front panel pocket - Additional space in the main compartment can be accessed by opening a zipper - Padded laptop pocket for computers up to 16" - Mesh pocket for clothes, etc. - A dedicated compartment for toiletries with its own zippermakes it easy to take out soap bottles and other items at security checks 80% of the polycarbonate shell material