The Topeak BackLoader is a large capacity seat bag specifically designed for bikepackers, offering a streamlined way to carry gear without the need for a rear rack. Its mounting system, combined with compression straps, effectively reduces the pendulum effect of large rear payloads, ensuring a comfortable ride over long distances. The bag is constructed from lightweight, polyethylene/nylon material and features water-resistant, roll-top closures to keep cargo dry. An included waterproof inner bag guarantees contents remain completely dry, and an air release system ensures the bag stays compact. It also includes a quick-release, tool-free mounting system and a safety light clip. This 15L model measures 67x28x18cm and weighs 565g. It is also available in 6L and 10L capacities.