To wash a North Face backpack, first, empty all pockets and remove any loose dirt. Spot clean stains with a mild detergent and a soft brush or sponge. Hand wash the entire backpack with cold water and a gentle detergent, focusing on areas with stains or heavy soiling. Rinse thoroughly with cold water to remove all soap residue. Air dry the backpack in a well-ventilated area, away from direct sunlight or heat sources. Do not machine wash or tumble dry.