WE DESIGNED THESE ABOUT 20 YEARS AGO, THE OXIDATION IS DONE ON PURPOSE. GREAT QUALITY 100% POLYESTER. JUST IN TIME FOR FOURTH OF JULY. OUR HATS WERE SHOWN ON CNN DURING PARADES WE ORIGINALLY WANTED TO LIST THEM ON THE 30TH ANNIVERSARY BUT DUE TO CIRCUMSTANCES WE ARE LISTING NOW THESE WERE BEING SOLD FOR MORE THAN 30.00 DOLLARS A PIECE COULD BE SOLD IN STORES FOR 20 DOLLARS NO QUESTIONS ASKED