Shoulder sleeve insignia
（重定向自Shoulder patch）
![Example of the four types of Shoulder Sleeve Insignia for the U.S. 10th Mountain Division (LI); Full Color, BDU Subdued, Desert Subdued, UCP Subdued](/Images/godic/202502/10/10thMtnDivTypes3654.jpg")
![Example of the five current types of Shoulder Sleeve Insignia for the U.S. 1st Cavalry Division; Full Color, BDU Subdued, Desert Subdued, UCP Subdued, OCP Subdued](/Images/godic/202502/10/CAV_patches_19_May_11_0023654.JPG")
![](/Images/godic/202502/10/US_Army_81st_Infantry_Division_SSI.svg3654.png")
![](/Images/godic/202502/10/001-Armored-Corps-SSI3654.png")
A shoulder sleeve insignia (often abbreviated SSI), is an embroidered patch used by major formations of the United States Army. Each formation has a unique formation patch, and the U.S. Army is unique among the U.S. Armed Forces in that all soldiers are required to wear the patch of their headquarters as part of their military uniforms.