12ftx18ft Best Commercial Grade Nylon American Flag 12'x18' US Flag Made in the USA Embroidered Stars Sewn Stripes by Flags Poles And More 100% US Made with the material even sourced in the USA!  EMBROIDERED STARS AND SEWN STRIPES Our flags are meant to last. We use a combination of the highest quality components and state-of-the-art manufacturing to give you the best looking and most durable flags in the industry. All labor and material are certified Made in the U.S.A. This flag CAN NOT be purchased in Big Box Stores. This is the flag you see on commercial flagpoles. Our unidirectional chain stitch is the strongest stitch for horizontal seams in the market today. This stitch will flex and resist breaking for a longer period of time than other manufacturing techniques. Our poly sateen heading is the whitest, strongest in the industry, we use a heavy nine ounce polyester sateen material. On flags 15'x25 and larger, we use webbing that is 3 times as strong as any seat belt. Construction begins with finest fabrics and color-matched threads available. We then carefully assemble each flag using a full  turn on all seams, a unidirectional chain stitch for all horizontal seams (it makes the flag stronger), and a lock stitch for all edge hems. Fly hems are finished with 4 rows of lock stitching and a 102 stitch X-Box reinforcement at the top and bottom of flags up to 6'x10. Flags 8'x12 and larger feature an X-box at each horizontal seam. Sizes 10'x15 and larger have 6 rows of stitching on the flyend with double X-box reinforcement on every seam.