In 1993, then Air Force Chief of Staff, Merrill McPeak introduced a new three-button service coat which featured no epaulets and silver sleeve braid loops on the lower sleeves denoting officer rank ("see also: United States Air Force officer rank insignia"). This style of rank insignia for officers, while used by British Royal Air Force officers and other air forces inspired by their uniforms, was unpopular and many senior Air Force generals commented that the uniforms of the Air Force now looked identical to those of commercial airline pilots. Epaulettes were put back on the coat for metal officer rank insignia and blue braiding returned to the bottom of the sleeves, in the style of the previous four-button, four-pocket coat worn prior to the adoption of the three-button coat. , this remains the coat used as part of the service dress blue uniform.