What Our Gearhead(R) Experts Are Saying:"I stuff this in my carry-on for every trip since it packs down to nothing. Once I land, it's my go-to for exploring a new city, water bottle pockets and all."A new city deserves a bag that doesn't get in the way, and the Viaje 9L Shoulder Bag stays out of it until the exact moment you need it. Stuff it into a suitcase pocket during the flight, then unfold it for a day of wandering unfamiliar streets, popping into shops, and grabbing coffee between stops, all without adding bulk to the rest of the trip.