See below. No doubt it's a $0.50 infrared filter disk, paired with a
particular type of fabric which has some IR sensitivity.
Hey, maybe PIRA could make piles of money by selling these for only $99,
instead of the $140 current price tag.
big :)
Or perhaps some ambitious students could replicate the effect and even
file FTC/FBI/USPO complaints against these fools (if that company is in
the USA, that is).