This Oklahoma Sooners Riddell Pro Line authentic helmet has been personally hand-signed by running back Adrian Peterson with the inscriptions "Boomer Sooner, 4045 Rushing Yards, 41 TDS, 1st Team All American." It is officially licensed by the NCAA and comes with an individually numbered, tamper evident hologram from Fanatics Authentic. To ensure authenticity, the hologram can be reviewed online. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud. This collectible is a limited edition of 28.