BEST FOR: Weekending and carry-on travel. THE TEST: A month in Australia and New Zealand didn’t faze the 40-liter Jetway’s reinforced, thermomolded plastic bottom and skid plate. (Another tester has been abusing an earlier version of this bag for five years with no zipper blowouts or other problems.) But its best feature is inside: a pull-out interior laundry bag keeps stuff like soaked base layers and muddy trail-running shoes from fouling up your entire bag. While the small (2.4 inches in diameter), inline-skate-esque wheels roll fantastically on smooth surfaces, they don’t do as well on cobblestones and dirt. THE VERDICT: As tough as it is sleek. 6.9 lbs
The Gravis and JanSport are carry-on compliant, as is the smaller 22-liter version of the Gregory.