Cotopaxi Allpa 42L Travel Pack

I picked the Allpa 42L for travelers who want a little more breathing room than the 35L without jumping to a full checked bag. The suitcase-style opening and the separate internal compartments are what I look for in a one-bag trip, since they keep packing organized instead of turning into a jumble. Just check the loaded size against your airline's carry-on limits, since a fully packed 42L can run large on stricter carriers.