Made with lightweight, highly absorbent and quick drying material for comfortable wear even in hot weather. You can wear it like a T-shirt. Competition Rules: The referee uniform is used as a referee shirt, long black pants, black socks, and black shoes. (Supplement) In Japans competitions, (1) You can wear the 2nd uniform top and bottom uniform only for the summer game. (2) As a general public prefecture vest for more than 16 official competitions, we wear the traditional JBA official uniform. (3) When wearing a second uniform, both the top and bottom are used as a second uniform, and wear the same uniform with a referee crew (4) The socks are black when wearing the second uniform. However, the above (1) to (4) can be changed according to the circumstance of the host in mind. Operation of the second uniform may differ depending on the competition. Please check the competition host before wearing it.