On a green square 2 1/4 inches (5.72 cm) on each side point up with a 1/8 inch (.32 cm) black border, five white stars edged silver gray along top sides above a sword with a yellow hilt detailed black and a silver gray blade with a black center line issuing red and yellow flames.
The stars represent the five mission elements of the Command: Chemical, Biological, Radiological, Nuclear, High-Yield Explosive Response. The stars also underscore the command being a multi-component unit in today's threat environment. The flaming sword highlights this country's aggressive stance with the battle against domestic and international terrorism. Green alludes to the Army as a land force. Black is in honor of the personnel who died on September 11, 2001, and the War Against Terror.
The shoulder sleeve insignia was originally approved for the 20th Support Command on 5 April 2005. It was amended to change the description and correct the symbolism on 6 May 2005. It was redesignated for the 20th Chemical, Biological, Radiological, Nuclear, Explosives Command effective 17 October 2013. (TIOH Dwg. No. A-1-872)