The design of the military jacket often features structured lines, sturdy fabrics, and an array of pockets, all of which serve practical purposes suited for soldiers in the field. Historically, these jackets were crafted from materials like wool and cotton, designed to withstand various weather conditions. During World War I and World War II, military uniforms underwent significant changes, and the jackets became symbols of national pride and duty. The iconic olive drab, khaki, and navy colors are often associated with military apparel, but over the decades, designers have played with color and patterns, leading to a vibrant evolution in the aesthetic of military jackets.