These are military velcro patches issued for Friend or Foe identification. The flag is made of material that reflects when viewed under IR light.
Infrared IR Full Color US Flag Patch Forward & Reverse VELCRO® Brand, Set of 2
Subdued American Flag Covert Spec-Ops IR (3.5x2) firm Patch with VELCRO® Brand fasteners — Empire Tactical USA
Subdued American Flag Covert Spec-Ops IR (3.5x2) firm Patch with VELCRO® Brand fasteners — Empire Tactical USA
Flag Patch: United States of America - IR Infrared Hook Closure Reversed
ACU patches - Set of 2 - 4 x 4 SOT Uniform Repair Patch Kit
IR FLAG PATCH SOLAR RUSSIA US UK CANADA OR OTHER NESworkshop
US Army Multicam FRACU Shirt, Hook and Loop Cuffs - Used, Medium Short
TAG Infrared American Flag Patch Military Uniform Velcro IR USA Flag for Covert Combat Identification - Olive Drab - LEFT
Reverse Flag Patch
Features:, Hook Field On Back, Issue Type: USGI, Manufactured by:, Various Government Contractors, Country of Manufacture: USA
US Army Private First Class Rank Patch