The Luminary 15 Ultralight (Read more about that here

(Read more about that here in our Guide To Backpack Frames

45L carry-on travel backpack that combines style with ultimate functionality

5": we'd recommend choosing the Medium/Large size

0" (w) x 12

in the overhead compartment or under the seat in front of you

The Luminary 15 Ultralight (Read more about that hereThe Luminary 15 (L15) is the bigger sibling to our popular Luminary 12 (L12) backpack. To better fit taller and or broader folks, we took the L12 and stretched it to be taller and a tad wider. We also lengthened and adjusted the contour of the shoulder straps. Otherwise, feature for feature, the L15 and the L12 are the same, so we ask in advance for your forgiveness if the product description below seems a bit familiar. Like we said, the Luminary 15