More durable. Discounts. Great Shipping. This is one of our most durable outdoor Confederate Battle Flags.It is made of Herculite, a very strong knitted polyester fabric. Polyester naturally inhibits UV, so it holds up to the sun better. It doesn’t absorb as much moisture as other fabrics, so it takes less abuse in windy conditions. The dye process used in this flag makes the colors remain brighter longer. It’s knitted weave not only adds strength but allows it to fly even in a light wind.