Mizuno made of polyester, in a yellow and black combination, perfect for tennis and soft tennis. - Brand: Mizuno - Color: Yellow/Black/White - Style: Tennis wear - Material: Polyester Thank you for viewing. I think it can be worn by upper elementary school students and junior high school students. I used it for soft tennis. It looks strong. There is a little dirt on the collar fold, but I don't think it's noticeable from the outside. See photo 5. Please understand that this is a used item before purchasing.