Like other textiles, the pennant should not be displayed permanently. With a proper hanging system it can should be fine for perhaps 6 months on and 6 months off at the max. A Velcro hanging system will keep a small pennant away from the wall but if it is larger or hung directly against a wall it should be lined for support and protection. And like everything else it should be monitored regularly for insect activity. If you need more information you can contact me offline at firstname.lastname@example.org.