There are two kinds of jerseys, one is the fan version and the other is the official version! The official version is hard to buy, and most stores sell the clear fan version! I don't know how to distinguish the fan version, but the official game version is better! Try the water! You will find that if you pour water out of a real jersey, the water will not penetrate into it, but if you pour water from the inside, the water will quickly penetrate into it, and the inside is the same as dry!