A backpack "mini-suitcase"
I have travelled light for decades....long before airlines began charging for checked bags. I always take a backpack, but sometimes have to add a 2-wheeled carry-on wheelie for when I need bulky winter clothes or sports gear. One problem is that often times, such as in third-world countries where sidewalks/footpaths are rough or non-existent, a wheelie is like a Toyota Corolla going off-road. This bag serves the purpose. When 2 bags have been necessary in the past, this bag does it all singlehandedly.
At 34 liters, this bag offers more room than most backpacks (except for hiking backpacks), likely because it is rectangular rather than arch-shaped. Think of it as a soft-sided wheelie case with shoulder straps replacing the wheels.
It opens like a traditional suitcase (like a book), rather than only at the top end (like nearly all backpacks), making the contents much more accessible and organizable (?is that a word?).
A side handle is good for carrying the bag in your hand. At present, when using the side handle, the shoulder straps flail around all over the place. The development team might consider sewing a new, openable loop containing a releasable connector to the rear of the bag. The shoulder straps could then simply be brought together in the center and the new loop used to wrap around them and keep them snug against the bag. Otherwise, the shoulder straps are constantly searching for something to get snagged to.
A great bag for my purposes when I need…