The product is a 2016 World Series jersey signed by Jon Lester of the Chicago Cubs. The autograph has been authenticated by Professional Sports Authenticator (PSA), ensuring its authenticity. This jersey is a valuable collector's item for fans of baseball and the Chicago Cubs, showcasing Lester's signature and association with the team. It is a unique piece of memorabilia from a specific player and championship season, making it a sought-after item for fans and collectors alike.