- WATER RESISTANT & DURABLE: Constructed from PU leather and polyester, this bicycle rack bag is designed to withstand the elements. Its water-repellent surface and easy-to-clean material ensure that your belongings remain protected from dirt, sand, water, rain, and snow. A rain cover is included for added protection. - AMPLE STORAGE SPACE: With a capacity of 7 liters, this bike carrier bag features a main compartment, an extra zippered top pocket, and an adjustable elastic cord for organizing your essentials. Measuring 12 x 6.7 x 5.5 inches (L x W x H), it is spacious enough to hold items like your wallet, phone, power bank, small speaker, towels, T-shirts, food, drinks, bike locks, small tools, and sunglasses. - ENHANCED SAFETY: Reflective strips are integrated into the design to improve visibility during nighttime rides. Additionally, the rear belt is compatible with a taillight (not included) to further enhance your safety while cycling. - SIMPLE INSTALLATION: Attaching this trunk bag to your bike or e-bike rack is effortless with the two velcro straps. The interior is lined with thin PE foam for added protection of your gear. When not in use, the bag can be easily collapsed for convenient storage. Use scenarios: 1. Perfect for daily commutes, allowing you to carry your essentials securely while keeping your hands free. 2. Ideal for weekend rides, providing ample space for snacks, drinks, and tools for minor repairs. 3. Great for short trips or errands, offering a reliable solution for transporting personal items without the bulk of a backpack.