Although most of our Large United States Army National Guard Patches have an iron-on backing, we recommend that you sew them on for longer lasting results. Our Patches are made from colorfast threads on heavy backing to keep their shape and good looks. These Patches look great on the back of a jacket! These Patches - Large make it clear that you or someone you know is proud to be associated with the National Guard. Your satisfaction is guaranteed, period. Usually ships within 3 - 5 business days.