what kind of dufflebag was Rocket wearing on the train in the suckerpunch movie?

I was watching suckerpunch and saw the dufflebag that Rocket was
wearing on the high speed train in suckerpunch in the scene where she
dies by staying with the bomb. I liked the bag she was carrying and
have never seen a dufflebag that doesn't open from the top but the
middle and has strap across the middle. So my question(s): what kind
of duffel bag is that? Where would I get one? Are there other
dufflebags like that style?

Please answer as many as possible and provide sources if you are able.