The 1991 NFL Pro Set Series 1 sealed pack contains vintage sports trading cards featuring popular players like Emmitt Smith, Barry Sanders, and Brett Favre. This pack is a collectible item perfect for fans of the National Football League and enthusiasts of sports trading cards. The cards are made of card stock and come from the Pro Set manufacturer, making them a sought-after piece for collectors looking to add to their collection from the 1991 season. Each pack includes one standard-sized card, making it a valuable addition for fans of football and trading cards.