The DUFFLE is both bag and backpack. While it comes in very handy if you need a companion for overnight, weekend or gym trips, it can also be worn on the back. Which is kinda nice, if you wanna bring your collection of precious minerals or other heavy stuff along the way. Apart from that, it then looks like a small rocket propulsion engine, which is especially cool on a bicycle (vrooom). On planes, the Duffle is perfectly hand-luggage-suitable.
Made of vinyl and polyester lining. Waterproof and suitable for wet content.