There's a large central compartment and enough pockets to keep all your necessities organized on the road. Add in the trolley sleeve and you just may never come back. Fully zippered front compartment and two back slip pockets, wide opening with double zippers and a sturdy, removable base, five inner pockets, zip closure. Dimensions 18 1⁄2" w x 12 1⁄2" h x 7 1⁄2" d with 6 1⁄2" strap drop; 48 1⁄2" removable, adjustable padded shoulder strap.