I travel 30 weeks out of the year and almost live out of bags. Since traveling today has changed so much I needed a bag that has almost no weight to it and that keeps expanding.This A.Saks bag (this is my 4 product from the A.Saks On The Go Line) is so rugged and I use it all the time. The wheels roll easily, and it has an extra zipper on top to expand it when I need more room. It also folds flat which is great for me when I am home because I live in New York City and I need all the room I can get.This Rolling Duffle packs like a suitcase and has a piggy back feature on the front so I can attach my laptop briefcase to the front. Also, the handle system retracts into a zipper so the airline people who throw bags around cannot throw it from the handle and break it off.GREAT BAG!!!!