Features: Safer-riding,the rear of the bicycle seat-bag is equipped with a safet-light stand, so you can install a bicycle tail light (not included) to ensure safer-night riding. Large capacity,meets all-you cycling need for store many-items such as small repair tools, taillight-gloves, phones, power-bank and so-on. sub-warehouse design makes the storage space larger. inside with small mesh for placing small things like credit card or small tools. Water resistant fabric,hard-shell saddle bag high-density waterproof material and rubber water resistant zipper are impervious to rain, protect valuables from water, dirt and dust, and ensure safe drying of-items. the-surface can be easily cleaned by wiping with your-hands. Easy to install, the product is easy to install, just stick two powerful hook-and-loop fasteners in the correct position under the-seat, and then firmly fix an adjustable hook-and-loop fasteners to the-tube. the high-quality hook-and-loop fasteners is reinforced and not easy to tear. Wonderful gift,sweet warm gift for friend family or yourself. Specifications: Material:PU+EVA+Nylon Color:Yellow,Black,Gray Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item. Package includes: 1 Bike Seat-Bag