The raincoat for backpacks up to 116L does double duty as a durable zip-up cover that fully encases and protects your backpack on the bus, train or plane while also serving as a raincoat. It is made of highly resistant nylon with bluesign® and GRS certification. It also works with straps to keep out the rain and includes a drawstring for customization. It also offers zip closures to protect the package during inspection and is also packaged in its own case.