Popular trench coat character costume ideas for Cosplay and Halloween
Lieutenant Columbo (Columbo) Costume
Make a Columbo costume with a rumpled beige raincoat over a brown suit, white shirt and loose tie, plus a cigar prop, a pocket notebook and a badge.
John Constantine (Hellblazer) Costume
A John Constantine costume is a black suit, white shirt and loose black tie under a long black coat, as Keanu Reeves wore it, or the comic's tan trench with a loose red tie and blond hair.