Warrior GloTape Subdued Infrared (IR) Reflective Flags are manufactured from specially-formulated material that only reflects infrared wavelengths when illuminated by light sources such as targeting lasers. When viewed with military night vision IR systems, the reflected IR light provides a simple marking method that identifies friendly persons to team members at distances up to 800 meters. All Flags are 53.9mm x 76.2mm (unless noted) and available with Velcro hook backing.