Hat tip to Soldier Systems for this one. Police Mag did a story on this stuff as well. I like it, and simple little tricks like this could really give you an edge out there. Especially if you are wanting to track movements through specific areas of your AO, or track someone to see where they go.

The thing with this stuff is it is an infrared or IR tag that looks like dirt/sand/concrete. So no one is going to know they are walking through it unless they are looking for IR dirt specifically. This is great for criminal forensics as well, just because you could prove instantly that a person is the guy that walked through your target area. Or imagine sprinkling this all over a specific jungle trail’s foliage, and everything that moves through it is marked? Very cool stuff and check it out. –Matt

Cyalume website here.