These are military issued IR US flags worn for Friend or Foe identification. The flag is made of material that reflects when viewed under IR light.
IR American Flag Patch
The Mil-spec Infrared Multicam (OCP) IR Flag Patch - American Made
My Base Guide - Why Is the Flag Backwards on Military Uniforms?
Genuine IR US Flag patches in tan and black; includes 1 x front facing flag and 1 x rear facing flag. Made with covert Infrared magic black Solas The
Infrared US Flag Patch Set - Tan & Black
Infrared Reflective American Flag Patch Forward
Military Reverse IR Flag Velcro Patch - Venture Surplus
Authentic US MILITARY- IR -INFRARED REFLECTIVE- Forward-BLACK- US FLAG VEL PATCH
Infrared Forward & Reverse US Flag Patch, IR Military Green & Black
Infrared Reflective Us Flag Ir Patches American United - Temu
2 PACK- 3.5x2 inch Ultra High Quality, MADE IN THE USA - NOT IMPORTED Military Grade durablity reversed (Night vision pic shows forward flag) this
2 PACK Set - Authentic mil-spec 2 x 3.5 Black and Tan (FORWARD and REVERSED) Us Ir Infrared USA Flag Military Morale Reflective Patch
Army Reverse Flag
The Mil-spec Infrared Multicam (OCP) IR Flag Patch - American Made
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Mil-Spec - 3.5x2 inch Genuine Mil-spec IR material - Ultra High Quality Military Grade durablity REVERSED
Forward OD Green Us IR Infrared Reflective USA Flag Military Morale Uniform (Hook/Loop) Patch