I bought this Osprey Meridian Wheeled Luggage at the beginning of the year, and put it through hell since. I've taken it to Cuba, Mexico -- twice! -- France, Italy and elsewhere. 

I've dragged it over medieval cobblestones, subjected it to rain and dirt, boat ramps and airport baggage-handling systems around the world, and still it looks and works like it's brand-new. 

I've stuffed it so full that the internal pressure must of have been enormous, but the fabric, stitching and zippers seem indestructible.

It's inherently flexible. I can hold the handle on the side while climbing up stairs, the handle on top while giving it to the airline agent and both top and bottom while loading it into the trunk of an Uber. I can roll it, and the wheels are amazing. Or I can wear it like a backpack.

A really nice day pack zips and straps on to increase the content.  

I love this backpack!! Click here to buy one for yourself! 

(Full disclosure: these links are affiliate links, so I'll get paid if you buy it. I only recommend the products I love...)