CARRY-ON APPROVED ON 109+ AIRLINES – At 54 x 35 x 20 cm (21.3 x 13.8 x 7.9 in), this backpack is sized to board as carry-on baggage on over 109 airlines – fits more, without checking a bag MORE SPACE, SAME TRAVEL-SMART DESIGN – This 42L backpack (1175g / 2lbs 9oz) features stowaway backpack straps that tuck away completely, letting you carry it duffel-style through transit before switching back to backpack mode in seconds BUILT TO CARRY MORE, COMFORTABLY – A high-density polyethylene frame sheet supports heavier loads and keeps the pack's shape, while the rear panel and shoulder strap airflow systems keep you cool, and the sternum strap locks in stability for longer days on the move TOUGH, WEATHER-READY MATERIALS – Made with 600 denier polyester and a 200 denier polyester lining, this abrasion-resistant, water-resistant build is engineered to handle rain, rough handling, and daily wear on the road ROOM FOR EVERYTHING, ORGANIZED YOUR WAY – A laptop sleeve (up to 15.6"), inner zip mesh pocket, front quick-access pocket, elastic pen loops, key clip, and expandable water bottle pocket keep gear sorted, while D-ring connectors, side compression straps, a trolley handle sleeve, lockable sliders, a self-standing base, and a TSID/OKOBAN ID tag keep everything secure