Large Capacity: The rear bicycle seat pocket with a main inner zipper pocket and an auxiliary mesh pocket, can fill tools and small items like keys, tissues. A perfect cycling bag to hold essentials, such as bike repair kits and tools, wallet, sunscreen, keys, snacks. Key Product Features Waterproof Material: The bike saddle bag is made of high quality waterproof material, providing the best waterproof performance to protect your valuables from water, dirt and dust. dust. It is durable, cold-resistant, wear-resistant, strong and easy to clean. Please do not soak this bag in water for a long time. Easy to installAttach the mounting bracket to the bottom of the bike saddle, and secure the bike pannier with adjustable magic straps , keeps the bag securely attached to the seatpost. Quick installation and easy removal, zippered pocket for easy putting on and taking off items. Universal bicycle bag: This bicycle cushion bag is made of high durability and wear-resistant material, not easy to deform, durable, elegant and in good shape. Suitable for a variety of bicycles and outdoor cycling, such as mountain bikes, folding bikes and road bikes. Safe riding: With reflective strips on the side of the bike saddle bag , will make you safer during night rides. And the sealed zipper will ensure your belongings are kept together and protected.