Polyester American Flags that are made in the USA. Featuring densely embroidered stars and stitched stripes, these are traditional, quality American flags These flags are made with 2-ply spun polyester which is the strongest flag material available. Since polyester flags are extremely durable, they are recommended for flying in all weather conditions. And it is the best material for larger flags, ideal for daily and long-term display. The unique open-weave reduces fabric stress by letting air flow through making it the longest lasting flag available.