The MLB and New Era will be introducing the new onfield 9/11 Authentic Collection hat. This version of cap will be worn by Major League Baseball teams on September 11th, 2011. The cap sees teams traditional colorways with the addition of the U.S flag on the wearers left side. As usual the onfield caps feature its performance fabric which has revolutionary wicking ability, superior drying, and is shrink resistant. Pick up the San Francisco Giants 9/11 Authentic over at HatClub.