Fjallraven Greenland Wax for impregnating G-1000? garments and The Fjallraven Kanken. Wax to enhance the water resistant surface. A simple process that should be repeated at regular intervals to help the garment or bag maintain its ability to repel water.
You can apply a thicker/thinner layer of wax depending on where you want to have more/less protection. Easily applied with a source of heat, for example an iron. For the Kanken, pay attention to the zip area and can be used all over the bag.