1. Fabric: PU synthetic fiber SELE BAG's high-density waterproof material and rubber waterproof zipper can be used to prevent rain, protect valuables from water, dirt and dust, and keep the product dry. The surface can be easily cleaned by wiping with your hands. . 2.: Bicycle saddle bag size 9.25 x 5.72 x 3.54 inches, main mobile phone, gloves, mobile phone for switch? Bicycle rubber repair tool kit, bicycle accessories, etc. There are three pockets in the main pocket, which can be used to store some valuable small items. In addition to a hidden water bottle pocket. This design makes the product look more beautiful, while also effectively preventing the internal items from falling. . 3. Seat height requirements: The bicycle seat bag is suitable for most bicycles with a seat height higher than 9.25 inches. Therefore, please measure the height of the seat before purchasing. . 5. Safe driving: The reflective strips around the bag make you visible at night and ensure your safety when riding. . 5. Quality service: If you encounter any problems after receiving the product, we will refund to ensure that you have a pleasant shopping experience.