Jack And Jill - The Duffle And The Backpack 2 IN 1 Bag. Highly on demand versatile bags have now arrived. Let the sibling rivalry be at its peak let Jack and Jill fight for who wants to own this cool Polyester bag.Tell them they both can have it as it can convert into a Duffle as well as a Backpack, as you want it, whenever you want it.Â