This bag is designed to keep your luggage safe from rain and splashing water in any weather. The overlapping lid made is made from stable EVA and is securely welded to the Thermoplastic body. Thanks to the plastic welding, these materials join seamlessly and securely with one another to keep out unwanted dust, debris, and water. The harness has snap buckles that allow you to move or fold the bag out of the way and access the fuel filler cap.