The product is a 2021 Leaf Pro Set Sports trading card featuring an autograph from Joe Montana, a Hall of Fame quarterback for the San Francisco 49ers. This card is part of a limited edition set with only 75 copies produced, with this specific card numbered 28/75. The autograph is authenticated by Leaf and appears in the form of a label or sticker on the standard-sized card. It is a unique and collectible piece for fans of the National Football League and football trading cards.