Rick's Favorite: This is the bag that Rick Steves is lives out of. It's the most versatile carry-on bag you'll find - at an unbeatable price.
Handy Extras: It's expandable while also having two internal and four external cinch-tight compression straps. It also includes a pair of mesh bags for smaller items, and a clip-in security pouch (which you can clip inside your Civita Day Pack).
Fits within airlines' carry-on guidelines; 14x9x21(unexpanded).
Easily converts from a smart-looking suitcase to a handy backpack.