Today, the buttoned fabric tabs on a trench coat’s shoulders look mostly decorative. On the military coats that shaped the modern trench, however, these straps held insignia identifying the wearer’s rank. They were not simply stylish flourishes; they helped make authority visible at a glance in crowded, confusing wartime conditions.
A Practical Piece of Military Design
The recognizable trench coat emerged during the First World War as a lighter, weather-resistant alternative to the heavy greatcoat. British officers purchased and wore these coats in wet, muddy conditions, where practical design mattered.
Shoulder straps allowed rank badges to be attached prominently without damaging the coat itself. According to the Smithsonian’s history of the trench coat, epaulettes on the shoulders indicated the wearer’s rank. Some straps could also help secure equipment carried over the shoulder, adding another useful function.
More Than Decoration
Rank insignia helped soldiers quickly recognize who held command. This was especially valuable when rainwear covered parts of an officer’s regular uniform. The shoulder area provided a clear, elevated place for that information to remain visible.
Other familiar trench coat features also began as practical military details. The storm flap helped direct rain away from the body, the double-breasted front provided extra warmth, and the belt created a closer fit. Even the coat’s khaki coloring suited military environments better than brighter civilian fabrics.
From Battlefield to Fashion
After the war, former officers continued wearing their trench coats at home. Hollywood later associated the style with detectives, spies, and mysterious strangers, helping turn it into a civilian classic.
The shoulder straps remained even when rank badges disappeared. Like the surprising story of how high heels were originally worn by men, they show how fashion preserves details long after their original purpose has faded.
Today’s trench coat may symbolize polished style, but its shoulders still quietly reveal its military past.