These are military velcro patches issued for Friend or Foe identification. The flag is made of material that reflects when viewed under IR light.
3.5 x 2 Reversed Tactical Infrared Reflective US Flag (Ultra Durable) 3M Combat Patch : Sports & Outdoors
Army Command Sergeant Major Rank Patch - Venture Surplus
Features:, IR IFF Patch, Hook & Loop Mounted Accessory, Issue Type: USGI, Manufactured by:, Various Government Contractors, Country of Manufacture
Military IR Flag Patch, Forward
SOLAS Infrared Reflective Reverse Ful Color US Flag Patch – BritKitUSA
3.5 x 2 Reversed Tactical Infrared Reflective US Flag (Ultra Durable) 3M Combat Patch : Sports & Outdoors
US Army Multicam FRACU Shirt, Hook and Loop Cuffs - Used, Medium Short
Rothco OCP Staff Sergeant Rank Patch - Venture Surplus
US Army Multicam FRACU Shirt, Hook and Loop Cuffs - Used, Medium Short
Condor Blood Type Patch, O Negative - Venture Surplus
The HeroUs Pride Full Color Reverse US Flag Patch with Hook is designed to be worn on the right shoulder of a US Army or Air Force uniform. This
Full Color Reverse US Flag Patch with Hook.
Reverse Flag Patch
US Black and Tan IR Reflective patch, mil-spec (forward and reversed) choose size with VELCRO® Brand fasteners — Empire Tactical USA