The product is an autographed Billy Sims 1980 Rookie of the Year #20 Detroit Blue football jersey with a Certificate of Authenticity from James Spence Authentication (JSA). This original item from Hall of Fame Sports Memorabilia features the signature of the NFL player, making it a valuable collectible for fans of the Detroit Lions and football enthusiasts. This officially licensed jersey is a must-have for any fan looking to add a piece of sports memorabilia to their collection.