A sports jacket commonly worn by American high school/college students and athletes. Traditionally, the wearing of such a jacket indicates that the student has met a specified level of participation or performance on a varsity team.

h4. See also

* [[sukajan]]
* [[track jacket]]

h4. External Links

"Wikipedia: Letterman (sports)":[https://en.wikipedia.org/wiki/Letterman_(sports)#Letter_jacket]
棒球外套 スタジアムジャンパー