The backpack does not have a traditional belt for attaching to a suitcase, but it features a Pass-Thru attachment strap. This strap allows you to connect the backpack to the handle of a wheeled suitcase for easy travel with multiple pieces of luggage.
Hello Tinu
I think the Carbon is great. The notebook has a nice space, there are only a few sweaty spots on the back, and it has a good air flow system. For daily shopping, it depends a little on what it is. Since it's not that deep due to the 2 large compartments, a loaf of bread would fit in the notebook since just under (because of the thickness of the bread), but otherwise plenty of things fit in. Unfortunately, I don't know the other 2.
Greetings