But seriously ...
X-Reflect X-ray Glasses
Based on infared light (not x-rays)
http://www.advanced-intelligence.com/goggles.html
$2400 US
$2800 US for a wireless version
From their FAQ:
Q. When you say see through, do you mean seeing just the outline of the object or actually seeing the object inside the material?
A. It does actually see the object not just the outline of the covered object.
Q. Why is that the Glasses can see through some types of material better than others?
A. Some type of materials nowadays, uses UV pass color to dye the materials in order for people to get sun tan without lines. Some of the color is not only UV pass but also are IR. pass ! making it possible for the Glasses to see through it like glass.
Q. If the materials are UV pass, why not use UV pass filters instead of IR. pass filters?
A. The Glasses can see IR. a lot better than it can see UV.
Q. What type of materials actually does theses Glasses see through?
A. Swimwear, Silk, and all types of synthetic materials are the best candidate.
In USA (summer time) in public areas, do expect about 1 out of 20 for normal clothing.
For swimwear, do expect approximately 70 out of 100 .
Approximately 45% of swimwear allow see through as though seeing through glass.