Available in 45, 85, and cavernous 125-liter sizes, the Stagecoach from Big Agnes is a burly rolling duffle purpose-built for travel & adventure. The outer material is a durable, waterproof nylon with welded seams that keeps water out. The frame is aluminum with an extending lockable handle for easy rolling and it’s also got Independent backpack straps to convert your duffel to a pack when the terrain gets too rugged for rolling.