The Sea to Summit Meridian 60L Duffle brings the same quick-change harness as the smaller Meridian sizes, so a bag built to carry more gear for a longer trip still switches between hand carry and backpack mode in seconds. A reinforced base and corners, all-metal hardware, and robust YKK zips hold up to checked-baggage handling at this larger size just as well as they do at 40L, so more capacity doesn't mean less durability. What Our Gearhead(R) Experts Are Saying:"I packed for a two-week trip and still had the straps out and the bag on my back within a minute of grabbing it off the carousel, size never slowed down the switch. It carries like a much smaller bag once it's on."