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 solid brass grommets. Hand fitted double needle seams with back stitch reinforcement. Four rows of lock stitching with back stitch reinforcements. Two rows of stitching on top and bottom hems. Premium quality extra strength polyester thread, color matched to stripes, front and back.