Robust, water-repellent and high-quality material: this bike bag made of high-quality nylon weber. The nylon weber is a robust and water-repellent material. The base is double padded with a special thickening that the bag is non-slip and abrasion resistant. The bag keeps your belongings completely safeWell made, solid and expandable capacity: 20 to 35 L large load capacity, extensive for your wheel jacket, repair tools, tyre pump and power bank, etc. The size of the main bag is 13 x 8.7 x 9.4 inches (L x W x H). On the two sides there are two additional zipped compartments. They offer an additional 7 L space. Extended compartment size: 10.6 x 13 inches (L x H)Multifunctional bike bag: If you are looking for a multifunctional and lightweight carry-on luggage, then you've come to the right place. This bag offers three different carrying methods to meet your different backpack habits. It can be used not only as a pannier rack bike bag, but also shopping bag and shoulder bag with adjustable shoulder strap. It is suitable for riding, walking, shopping or picnics.Unisex bag and easy installation: our unisex pannier rack black bike bag is a gift suitable for men, women and even children. The bag is easy to carry. Two durable Velcro fasteners attach the bag firmly behind the saddle. It is universal for all types of bicycles with a rear seat, such as mountain bike, road bike, etc.