X-Ray Specs are an American novelty item

Novelties

A novelty item is a small manufactured adornment, especially a personal adornment.- Novelty item :This term covers a range of small manufactured goods, such as*antiques*collectables*chocolates*esoterica*executive toys*gadgets*tools and implements...

, purported to allow the user to see through or into solid objects. In reality the glasses merely create an optical illusion; no X-ray

X-ray

X-radiation is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV rays and longer than gamma...

s are involved. The current version is sold under the name X-Ray Spex; an essentially identical product is sold under the name X-Ray Gogs.
X-Ray Specs consist of an outsized pair of glasses with plastic frames and white cardboard "lenses" printed with concentric red circles, and emblazoned with the legend "X-RAY VISION".

The lenses consist of two layers of cardboard with a small hole about 6 mm (.25 inch) in diameter punched through both layers.