Yokohama High School Hardball Baseball Club V-neck Jumper Size L to XL (no marking) I received this from a member of the team that won the Spring Koshien in 2006. It shows signs of wear, but is still wearable. It's a thin material, so it can be worn over a uniform. Daisuke Matsuzaka, Hideaki Wakui, Yoshitomo Tsutsugo, Koshien, High School Baseball