1Made of Pu+Pvc material with strong waterproof performance, and equipped with a waterproof cover, double?layer protection to avoid rain intrusion. 2Motorcycle rear bag allows you to carry a large amount of supplies, ride in various weather conditions, and effectively store protective items. 3The backpack has a large storage capacity and can be expanded with the items that need to be stored. The maximum capacity can be expanded to 21L. 4Equipped with a shoulder strap and a fixed strap, which can be used as a shoulder bag when needed, which is convenient for getting off the car and carrying it. 5Reflective design is set on both sides of the bag, which greatly improves the visibility in low light and night.