Note: This company is under review; see comment below post.
Star Spangled Flags uses scientifically designed, premium quality heavyweight 200 denier nylon, for their built by Americans
United States Flag
Every US manufactured Flag, including the American Flag is sewn using 2 rows of stitching per seam, the stars of the American Flag are embroidered using a densely filled thread count. There are two brass mounting grommets and four rows of lock stitching ( quadruple stitching) on the fly end of all of their Flags.
The US Flag selection includes the United States Flag and several State Flags; the Texas, California, and Colorado Flags have the same quality construction are “made only with the best materials available (sourced and combined only in the USA of course)”. The US Flags are treated to be highly resistant to UV fading, and display deeper and brighter colors that last.