Latest Invisible Ink Sunglasses

This latest infrared sunglasses is also in the aviator model with silver mirror lens, which is a much progress to the traditional IR sunglasses with purple lenses.
Now only our company study out this technology so far in the marked cards industry. People might seldom doubt about this silver sunglasses to have special function of seeing invisible ink marks. 
This new infrared sunglasses look like the ordinary sunglasses in appearance, which makes it safer to use in poker games with marked cards.