Description
A rectangle arced at the top and bottom with a 1/8 inch (.32 cm) yellow border, 3 inches in height (7.62 cm) and 2 inches (5.08 cm) in width divided per pale with two conjoined chevrons reversed in chief, buff and black all counterchanged, in base a green ivy leaf edged white.

Symbolism
The “W” or the two conjoined reversed chevrons stands for the unit’s unofficial nickname “Wrangler” and is adapted from their previous shoulder sleeve insignia. The counterchange of black and buff signifies teamwork and a cohesive unit. The contrast of these two colors refers to day and night around the clock vigilance. Buff is the primary color for army support. The ivy leaf is modified from the 4th Infantry Division which the Brigade supports.

Background
The shoulder sleeve insignia was originally approved for the 4th Support Brigade on 21 June 2005. It was amended to change the symbolism on 30 June 2005. The insignia was redesignated for the 4th Sustainment Brigade with symbolism revised on 5 May 2006.