The side zipper can be opened to expand the gusset. It has a belt to attach to the handle of a suitcase. ■ Size: A4 size compatible Width 37cm, Height 29cm, Gusset 9.5cm, Handle 44cm (can be worn over the shoulder) ■ Specifications: ・Zipper closure ・Gusset expansion zipper on the side ・Belt to attach to the handle of a suitcase ・Inner pocket (with zipper) x 1 ■ Color: Navy ■ Material: Nylon + Urethane resin The handles are quite damaged. I was using it with a handle cover.