The NFL Mystery Cards Pack is a guaranteed autographed pack featuring players like Joe Burrow, Trevor Lawrence, and Lamar Jackson. This set includes more than 10 cards from various NFL teams, with autographs authenticated by Panini Authentic. The cards are made of paperboard, card stock, and plastic, and come from sets like Optic, Panini One, and Mosaic. Each pack offers a chance to collect unique memorabilia from top athletes in the National Football League.