You know that dream trip, the one that starts with a surprise phone call, a quick trip to the airport, and has no itinerary? The Topo Designs 40L Travel Backpack is the pack for couch surfers with style, perfect for open-ended road trips and weekend getaways that spill over into the next week. Designed to fit within airlines' carry-on restrictions, it's got 40L of storage in a compact package--without being cumbersome like a traditional rolling bag. With bomber materials and smart design, you'll be slinging this one over your shoulders for years to come.