Hard Shell Bag: This bike rack bag is constructed from durable EVA with a PU coated surface, ensuring it can handle heavy loads while protecting your belongings. Its anti-collision design makes it easy to clean and built to last. The sleek black line design adds a touch of modern style. 10 Liter Capacity: Measuring 15.16 x 7.68 x 6.3 inches (L x W x H), this trunk bag offers approximately ten liters of internal space. It features elastic straps on top for securing items and side pockets for easy access to essentials. Ideal for storing a bike tool kit, pump, wallet, cell phone, power bank, snacks, drinks, bike lock, sunglasses, and more. Detailed Design: Equipped with reflective elements on all four sides to enhance visibility during nighttime rides. A strap on the back allows for easy attachment of a tail light (not included) for added safety. The bag includes one buckle mounting strap and two velcro straps, ensuring maximum stability on various bike racks, including mountain bikes, road bikes, and e-bikes. Multifunctional: The bike bag comes with an adjustable shoulder strap and a handle for versatile carrying options. It is perfect for a variety of occasions such as picnics, camping trips, commuting, hiking, or traveling. Whether you need to carry your gear to the park or your essentials for a weekend getaway, this bag is your reliable companion.