A trench coat is a type of long, waterproof coat that is typically made from heavy-duty cotton gabardine, leather, or a blend of materials. Originally designed for military use during World War I, it features a double-breasted front, wide lapels, and a belted waist. The coat often has deep pockets and a vent at the back for ease of movement, making it both functional and stylish. Trench coats are popular in fashion and are often associated with classic styles and sophistication. They come in various colors, but the traditional colors are khaki, black, and navy blue. Worn by both men and women, trench coats can be paired with casual or formal outfits, making them versatile wardrobe staples.