?Durable&Water-Resistant?The main fabric of the motorcycle tail bag is made of high-quality water-resistant PVC material, with reinforced steel wire and PE board support for overall stability, stylish and sturdy.The bottom is added with anti-slip and wear-resistant material which is more non-slip and durable. ?43-50L Expandable Large Capacity?The normal capacity of the motorcycle travel luggage bag is about 43L, with size is about 20.5*14.2*12.2 inches.When the double-sided zipper is fully extended, the capacity can expand to around 50L, the expandable size is about 23.6*14.2*12.2 inches. When folded for storage, it has a small size of only 12.2*7.9*3.5 inches. ?Humanized Design?The top of motorcycle rear seat bag is designed with elastic straps for carrying raincoats, helmets (helmet net bag required), and other travel essentials.The double zipper pockets and ample compartments make storage and access easy;the buckle straps with buckle function secure the straps when tightened, effectively solving the problem of straps coming loose due to riding bumps. ?What’s Package Include: Comes with shoulder straps that can be attached to the bag for use as a luggage bag when taken off the motorcycle;two extension straps are provided to help secure the bag outside of large items;four tie-down straps help secure the bag to the frame;includes a rain cover and storage bag for use in heavy rain, and can be stored in the included storage bag when not in use. ?Suitable for Various Models: Our motorcycle saddle bag prefect for mostly motorbike: large and medium-sized adventure touring motorcycles, medium-range street motorcycles, and urban retro cruisers.