This autographed custom on-field style adult XL jersey has been personally hand-signed by Darius Slayton of the New York Giants. This autograph is certified by James Spence Authentication's (JSA) Witnessed Protection Program. That means that a JSA representative was present when this item was signed. It comes with the numbered hologram and matching Certificate of Authenticity Authentication: JSA COA PLEASE BE AWARE OF THESE COSTS BEFORE BIDDING.