Description:With carrying handle and adjustable shoulder strap, the bike rack bag can be used as a handbag or shoulder bag as well.Reflective design is used for improved visibility and safe riding at night. And it has large-capacity for you to store many items.It is made of tarp, PVC, TPU hard shell material, which is wear-resistant, waterproof and dirt-resistant. Hard shell provides excellent protection against elements like rain drops and impact.The length of this product is 40cm, the width is 20cm and the height is 23cm. This is a great bag for cyclist. And quick-release mounting strap makes it easy for you to install.Item Name: Bike Rear Seat BagMaterial: Tarp, PVC, TPU Hard ShellCapacity Before Expansion: 13LCapacity After Expansion: 25LFeatures: Large Capacity, Waterproof, Reflective DesignSize Details:L: 40cm/15.75", W: 20cm/7.87", H: 23cm/9.06"(Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bike Rear Seat Bag (Others Not Included)