Difficulties: Many motorcycles on the market cannot be equipped with side frames, but need to carry a number of gears for long-distance riding. The rider could not find a suitable tail bag, nor could he install a saddle bag or saddle bag.Requirements: universal: no rack, suitable for streets, race copies, etc.), capacity: capacity, but when not in use, compact structure, reducing wind resistance, simple storage waterproof and dust-proof: on this basis, we developed this bag: no choice of bicycle models, capacity, expandable design, multi compartment, waterproof and dust-proof, durable, etc.which allows you to focus on riding, and do not worry about using it in harsh environmentsColour: BlackMaterial: PolyesterItem Type: Back BagsCapacity: 35L-50LMotorcycle Model: Almost All MotorcyclePackage Contents:1X main bag2X D-buckle accessories4X 2CM fixed strapOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.