If combining sport and travel is your thing, then the Deuter Aviant Pro 60 Duffel Bag is the bag for you. It offers ample space for your gear and clothing and features stowable shoulder straps, which means it doubles as a backpack too. The canvas material ensures that it is robust and water- and dust-resistant. When you're back home, you can easily fold your duffel and store it in the integrated outer pocket.