There's a metacafe vid someone posted here on this. You can make your own NIR goggles for much cheaper. Take a pair of welding goggles with removable lenses, and you sandwich in two thin plastic theatrical stage lighting gels, a very deep red and a very deep blue.
You remove the dark welding lenses, use them as a pattern to cut circles out of the theatrical gels and put them in the welding goggles. They work by blocking almost all visible light, the red cuts out all the green blue and violet, high wavelengths, and the blue filter cuts out all the yellow orange and red. However, the theatrical gels are still moderately transparent in near IR. The human eye has a teeny bit of sensitivity to near-IR (varies from person to person though...), and when you put the goggles on, you'll see sort of a weird contrasty image of the world, kind of like a purple-reddish version of what the night-shot camcorders will show you in green. The purple will be what little visible light is making it through the stacked red and blue gels, and the dull red will be the Near-IR.
You can see through some thin gauzy fabrics because the long wavelength of NIR can pass right through the weave, and other weird effects like things that are dark in the visible spectrum might be bright in NIR, and things that are bright white in visible might be darker in NIR.
Think of TV shows where they use night-shot, someone with a black shirt and white pants under daylight might look like a bright light green shirt, and dark green pants under the NIR=Green night-shot camcorder mode.
The glasses aren't a total scam, they probably do work a little bit, but at that price they're still almost a 99.9% scam. And since the eye's sensitivity to NIR is so miniscule, you really need something that blocks out all extraneous light like those welding goggles in the Metacafe video. With those e-bay glasses you'll probably see a faint weird shimmer on things, like when you wear the red-blue 3D glasses around the house and things sort of look light and dark at the same time, but ambient light leaking in from the sides will mostly wash it out. Besides the outrageous price, the scam part is where they call these glasses "THERMAL". NIR is not thermal IR, which is much, much deeper into the spectrum. NIR, is just regular light, just a teeny bit beyond red. Just like how near UV is just a teeny bit past violet.
You can also get a similar effect if you bust out the dark purple plastic windows from TV remotes that cover the NIR LED's and look through them.
