What is the name of the coat that Brian Dennehy wore in Rambo First Blood movie?

In "Rambo: First Blood," Brian Dennehy's character, Sheriff Will Teasle, wears a distinctive green military-style jacket. This coat contributes to the rugged, authoritative look of his character as he confronts John Rambo. The jacket has become iconic in association with the film and its themes of law enforcement and survival.