Nylon is the most popular flag material. These durable flags will fly in a light breeze, stand up to bright sunlight, and will dry quickly. One specific brand of nylon is NYL-GLO. Polyester is heavier than nylon and lasts longer with richer colors. While these flags do not fly well in light breezes, they are ideal for high wind locations. Cotton is the traditional material for flags and provides deep rich colors for display use. Cotton does not fly well in light breezes and is not as durable as nylon or polyester flags.