The product is a 2026 Topps Series 1 trading card featuring Major League Material Marcelo Mayer from the Boston Red Sox. This rookie insert card includes memorabilia from the MLB World Series, making it a unique and valuable addition to any baseball card collection. Manufactured by Topps, this English-language card is made of 20 Pt. card stock and is part of the Major League Material insert set, showcasing the talent of Marcelo Mayer in the Major League Baseball (MLB) league.