Polyester: This is another synthetic material meant for outdoor use, but this material is a bit more rugged than nylon and works well in areas that have steady, high winds and harsher conditions. Polyester is a heavier material, especially if it is two-ply, so it needs a stronger wind to make the stars and bars fly. Another aspect of polyester flags is they tend to look and feel more like traditional, historic flags. If you live along the coast, where there is usually a strong wind and salty air, polyester flags will last longer in your area. Polyester flags are recommended in other areas that normally have high gusts and sustained winds or if you plan on displaying your flag outdoors 24-7. They will typically last longer than nylon and cotton flags. For those looking for an outdoor American flag both nylon and polyester are very popular choices., Shop high-quality American flags made with pride & craftsmanship. Discover flags, accessories, & more to showcase your patriotic spirit!, If you're looking for a high quality American flag made in the USA, this article will help you out a lot. We share the most reputable flags made by brands that employ hundreds of American workers..