UncleFlag's Polyester Outdoor American Flags are crafted with the best polyester fabric on earth. Each outdoor flag is crafted specifically for continual 24/7 outdoor use. Each American Flag is manufactured with exclusive 100% spun woven, two-ply polyester yarn that is made with an open weave to reduce fabric stress. These Polyester flags combine strength with additional richness and vividness of color. The stars are dense-filled embroidered (15'x25' and larger American Flags have appliquéd stars). The stripes are hand fitted, double needle, sewn at the seams with reinforced stitching. The fly ends have 4-8 rows of lock stitching (depending on size) with back stitching and “X” stitching reinforcements. These top quality Polyester Outdoor American Flags combine lustrous beauty with superior wearing and excellent fly ability. You cannot buy a better Polyester American Flag!