https://nargear.com/shop/firefighter/carryon-gen2-45l/
Each member of my family has one of these in the carry on size, and then we also have 2 of the "skidmark" size-but we generally try to to travel with carry ons only so those don't get used as much.
I love this bag. It's comfortable on my shoulders/back and very sturdy. I don't really do luxury travel, and sometimes need to walk longer distances and up stairs/steep hills with my luggage and this bag makes it easy. I also sometimes travel where my bag is tied on the roof of a vehicle, and this bag can handle being exposed to the elements.