This American Flag has the best resistance to damaging ultraviolet radiation. The base fabric is the longest lasting Nylon material available, has a dense 200 denier weave and is manufactured in the U.S.A. It flies in the lightest breeze and provides the brightest colors for a vivid appearance. We guarantee that every flag will stay Colorfast for one full year from the date of purchase or Annin Flagmakers will replace it at no charge. Each flag comes with a ColorFast Guarantee. A ColorFast Guarantee form is included with every flag. Finished with canvas heading and roped heading for extra strength. Six or more rows of lock stitching with back stitch reinforcements. Fly hem corner patches on sizes 15 ft. X 25 ft. and larger. Two rows of stitching on the top and bottom hems.