Design benefits are everywhere Double zipper Hard shell LOGO Secure buckle lockable zipper ?UNIQUE MATERIAL: The top of this motorcycle tail bag is made of EVA material, the material is relatively hard, not easy to be squeezed and deformed, not easy to wear and tear, the whole bag looks three-dimensional and stylish, you can safely store items inside, and it is also waterproof performance. ?SCALABLE LARGE CAPACITY: The height of this motorcycle luggage bag can be expanded from 20 cm to 33 cm, and the volume can be expanded from 20L to 35L. There is also a zippered mesh pocket inside, and the compartment design can hold all the belongings you need and take it. are very convenient. ?DUAL USE: This motorcycle saddle bag can be connected with the shoulder strap to form a backpack. When riding, you can choose to carry it or install it on the saddle, which is very free. After the ride, you can put it on your back and leave without worrying about losing your belongings. ?WATERPROOF: This motorcycle tail bag is waterproof, if you are still uneasy about its waterproof performance, don't worry, we have equipped you with a free rain cover for you to use, double waterproof, you can use it in rainy days with confidence, Go for a ride in the rain! ?APPLICABILITY: This motorcycle seat bag can be applied to most models, and the simple and fast installation method, you will be able to master it quickly. We assure you that if the product has any quality problems that affect the use within one year, we will provide free replacement services, and we are very confident in our products.