Consider the trench coat

Steve McQueen, Bullitt

Alan Ladd with Veronica Lake, This Gun for Hire

Humphrey Bogart, The Big Sleep

Robert Mitchum, Out of the Past

Jean-Paul Belmondo, Le Doulos

George Peppard with Audrey Hepburn, Breakfast at Tiffany's

Fashionable for heroes and villains alike. The coat for wind, rain and coolness.