21 liter combined storage capacity. One piece "L" shaped backing and bottom structure. MOLLE attachments for universal anchoring points to secure the bag down as well as use for additional attachments. Easy access lid with metal g-hooks open up to main compartment. Side release buckles on top of lid allow for additional attachment. Brackets which mount between strut and fender included. Interior mesh pocket on top of lid and back of the bag. Comes with internal stuff sacks. Easy on, easy off Installation with throw over design. Compatible with fixed or detached sissy bars. Fits ...