With my purchase of a suitcase, I received a free duffle bag (Amazing deal, right?!) The material that the duffle bag is made out of seems very durable. The bag is a perfect size for a personal item on flights. I love that it can be worn as a backpack. My only downside to the duffle bag is that if the straps are used to be a backpack, you are unable to zip up the pocket that the straps come out of. With this pocket being on top (when worn as a backpack), it would be nice for it to zip up. You simply lose a pocket if using this bag as a backpack. Aside from that, the duffle bag is well-made & durable. Will be using this duffle bag for weekend trips often!