Description
A rectangle arched at the top and bottom 3 inches (7.32 cm) in height and 2 inches (5.08 cm) in width overall divided per bend sinister Celeste (Bluebird) and Azure (Flag Blue), a scarpe Buff, overall a Black bayonet point up outlined Golden Yellow, in chief an arc of three mullets of the last; all with a Golden Yellow 1/8 inch (.32 cm) border.

Symbolism
The light and dark blues reflect the colors of the U.S. Infantry, past and present. The tan diagonal line represents the Defense of Saudi Arabia and Liberation and Defense of Kuwait, the unit’s most recent campaigns. Gold is emblematic of excellence and signifies the Infantry Brigade’s supporting combat arm, Armor. The three stars are for World War I, World War II, and Southwest Asia Campaigns and commemorate the participation credits the Brigade was awarded in these Theaters of Operation. The upright bayonet symbolizes the combat mission of the 170th Infantry Brigade and its status of being a forward deployed unit.

Background
The shoulder sleeve insignia was approved effective 16 October 2009. (TIOH Dwg. No. A-1-994)