Ultra Gard has created a luggage rack bag made of high quality weather resistant materials, durable construction and a sturdy mounting system. A large main compartment allows for maximum storage. An additional four easy access zippered compartments with two expandable side pockets add up to 3, 320 cubic inches of extra storage space on your bike. Also included is a rain cover and comfortable shoulder strap. Dimensions 20 inch length x 10 inch width x 8. 5 inch height.