Ample space, versatile pockets, and a removable strap for two carrying styles and self-developed tech fabric is durable. MaH's self-developed tech material: more durable & antifouling than ordinary polyester Roomy main compartment for ample storage Versatile back slip with zippers, serving as storage or luggage pole sleeve Interior padded sleeve for 15-inch laptop protection Removable strap for two carrying styles: tote or crossbody