adidas Federation Youth Mystery Jersey 2016. What is it? The fan jersey mystery box contains one Adidas Federation youth jersey (could be for Germany; Mexico; or another team) with one of your favorite players including Muller; Ozil; Chicharito; Reus; etc.You just tell us what size you\'d like and we send you one jersey from the 2016 season.The jerseys you receive could be any player. All jerseys are official merchan dise and include the authentic customization. Products might show signs of wear or have cosmetic imperfections. Mystery kits are; of course; nonrefundable/nonnegotiable.