The first thing to know about this riff on the classic trench: It’s cut from a structured cotton canvas gabardine that has a water-repellent, stain-resistant finish. As for the design: The fit is relaxed, with an inverted pleat in back that lends some subtle volume. It has a point collar, an asymmetric snap closure, and a hem that hits just below the knee. The finishing touches? A storm flap, epaulets, and belted cuffs.