Annin Flagmakers dyes its own Nyl-Glo ColorFast U.S. Flags. It is guaranteed to retain ColorFast for at least one year. Large, vivid stars are richly embroidered with ultra-bright polyester thread. Seams are double-needle stitched with premium, extra strength polyester thread, color-matched to stripes with back-stitch reinforcement. Four rows of high strength lock-stitching on the fly ends reduces fraying and extends the flag's life. Sturdy, weather resistant brass grommets provide greater flag security. Measures 4' x 6'.