letter jacket

A Letter Jacket is a jacket traditionally worn by high school and college students in the United States to represent school and team pride. It is usually made of wool and leather, with the wearer's name stitched on the breast, and the sport(s) and/or activities(s) in which the wearer participates stitched on one arm. Letter jackets are usually produced in the school colors. The letter jacket derives its name from the letter or letters on its left breast, which are almost always the initials of the high school or college the jacket came from. For example, a letter jacket from Jersey High School would have a large J on the left breast. Letterman Jackets are also known as "Varsity Jackets" in some places.

如果你经常看美国的校园剧的话，应该可以看到，美国校园，尤其是高中或大学校园里面，一些团队经常会自己制作夹克衫。例如棒球队的夹克衫。
这种夹克衫通常是由羊毛和皮革制成，在胸口缝有字母，字母一般是学校名字的缩写。颜色的话通常是学校所象征的颜色。