In the world of travel gear, the name Peak Design is synonymous with quality and innovation. Recently, I had the pleasure of trying out their Duffelpack 65L. As you may be able to guess from the name, it’s a spacious backpack that doubles as a duffel bag.After testing this bag in a few different countries on a few different trips, I’ve found that it’s a great solution for one-bag travel. As expected, Peak Design has come up with something fun and functional. That’s not to say it’s a perfect bag, but I did enjoy toting it around Europe this summer.