The Topeak MidLoader provides all the storage you need for you bike-tour essential tools. Designed to make use of the space in your frame, the MidLoader carries your heaviest items keeping the bike balanced and comfortable. Lightweight, Polyethylene / Nylon ConstructionWater Resistant ZipsVelcro Mounting Straps3L Capacity: 37.5cm x 12cm x 6cm - 150g4.5L capacity / 46x12x6cm / 200g6L capacity / 54.5x13.5x6cm / 337gConstructed of lightweight, highly water resistant and durable materials, the MidLoader mounts and removes quickly thanks to the hook and loop fasteners and access is easy thanks to the water-resistant zippered openings on each side. The MidLoader is a must have for your next bike packing adventure.