Rolling Backpack: Wheeled backpack with zip-away, single tube rotating handle and 360 degree reflectivity; Material: Polyester Easy Portability: Smooth-rolling, corner-mounting wheels allow effortless and effective mobility for the backpack with wheels Interior Pockets: Large main compartment, full length secondary pocket, and fully padded laptop sleeve inside; Weight: 4.85 pounds Outside Compartments: Exterior front accessory of bag with wheels pocket organizes small items and side pocket holds water bottles; Color: Black Comfortable Straps: Tuck-away backpack straps with airmesh and foam create unmatched breathable comfort for backpack on wheels; Dimensions (L x W x H): 21.60 x 10 x 15.60 inches