This bag is constructed of water/weather resistant textile, and leather-like panels. Large, full-size openings allow you to easily access contents while bag is still secure to bike. Fully adjustable sissy bar mounts, goes on easily over any size sissy bar pad, and once adjusted it never has to be adjusted again for your pad. Rigid bag holds shape even when empty. Top roll bag included for extra volume, straps on top of bag secure roll bag or strap down a jacket, or rain gear, etc. Main bag carry handle, backpack straps, and shoulder straps included for easy carrying off bike. Top pocket organizer, and lockable zipper pulls. Size: 18" x 15" x 8".