This shopping bag features a zipper closure, a double inside pocket and an interior fold-out system with drawstring closure to increase its capacity. The MiniBag Plus MF is adaptable to the Rolser chassis (not included). Already have a chassis? Perfect! Just attach your shopping bag to it and you're ready to go. A bag? A trolley? Or all-in-one? Up to you. Shopping bag compatible with Rolser chassis: 2L, 2LRSG, 4L, 4LT, and 6L.