The Topeak FastFuel DryBag II is a premium waterproof top tube bag engineered for cyclists who demand accessibility, durability, and aerodynamic performance. Constructed from tough TPU-coated material, this hard-shell bag keeps your gear protected from rain, mud, and impacts while maintaining a sleek, low-profile silhouette. With 0.8 liters of internal storage, it accommodates energy gels, small tools, or a smartphone—ideal for triathletes, endurance riders, and commuters. The dual mounting system supports both strap and bolt-on attachment, offering flexibility for modern and traditional bike frames alike. Designed with a smooth, contoured exterior to reduce drag, the FastFuel DryBag II minimizes leg interference for a streamlined ride. Weighing just 112 g, it strikes the perfect balance between strength, utility, and lightweight performance for all cycling conditions.