This jersey has four sets of mini numbers that have been signed by quarterbacks Joe Montana, Dan Marino, John Elway and Johnny Unitas. It also comes with career highlights for each player that have been engraved onto the sleeves of the jersey. It is officially licensed by the National Football League 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.