According to SSD reader Malcolm, one of the most astonishing things seen at the recent IDEX show was the Infrared Badges from Toye, Kenning & Spencer. They have a long tradition of providing the finest in heraldry devices but have recently applied some interesting patent pending technology to their badges. Unlike printed IR badges, the IR properties are in the yarn. This means that there no risk of the properties rub off but are are contained in the threads. Additionally, there is nothing that indicates to the naked eye that the badge is IR reflective. There is a lot of potential here.
Infrared Badges from Toye, Kenning & Spencer