I have one of the very nice extremely versatile Patagonia Black Hole Mini MLC Pack backpack travel bag. You will need to look this up as has tons of features. Tons of storage 30 liter capacity, can be worn as a backpack or with the detachable shoulder strap as a side duffle. Has passing window strap so you can put onto your handle of wheeled luggage as well. Laptop compartment, many separated storage compartments. This bag is made in a Mini 30 liter and regular MLC 45 liter. Fantastic material you will love this bag. This is $200 in stores, with tax $216. I will accept $100 FIRM first come!