This bag is designed to keep up with whatever adventures and challenges you throw at it. It is fully weatherproof and constructed from PVC-free tarpaulin, which is both water and abrasion resistant. The bag comes equipped with a roll-top closure that a waterproof closure design that ensures your cargo is protected from the environment. Carbon Neutral Vaude ensures a feel-good promise, and when constructing the Aqua Back Rear Pannier they ensure it meets their Carbon Neutral policy. This means that this product has been made whereby all emissions from the materials, the manufacturing process, and shipping have been reduced and fully compensated.