A trenchcoat, or trench coat, is a raincoat made of waterproof, heavy-duty cotton gabardine drill or poplin, or leather. It generally has removable insulated lining, ragline sleeves, and the classic versions come from above the knee to meeting at the mid-calves. The garment traditionally is double-breasted with ten buttons, has wide lapels, a storm flap, and pockets that close.
They were initially used during World War I by Great Britain and France as a replacement to the heavy siege greatcoats in the same war.
Colonel Volgin wore a green-gray trenchcoat that also doubled as his Soviet uniform while he isn't showing his rubber combat suit. This ended up destroyed shortly before his fight with Naked Snake when he unleashed the full extent of his electrokinetic abilities. He, as the "Man on Fire," was also seen wearing a similar trenchcoat while attackinga hospital in Cyprus, although it disintegrated when he was hit with missiles fired by a helicopter.
Big Boss wore a trenchcoat with his suit during his time as commander of FOXHOUND and in 2014.
All members of FOXHOUND wore long trenchcoats with seven buttons and padded shoulders when Liquid Snake became the group's squad leader. Ocelot also wore a trenchcoat in 1984 and during the Tanker Incident in 2007.
AbbyShot Clothiers, a company that creates movie and video game-inspired clothing, created two versions of the FOXHOUND trenchcoat: the standard coat, priced at $399 CAD ($385 USD), and a custom sized version priced at $499 CAD ($482 USD), both based on it's dark brown appearance in The Twin Snakes.