FYI - The MM Wave scanners cannot see through wet clothing. It's the moisture content of the human tissue that creates the image by absorption of the waves. That's why (1) the images are fuzzier than x-ray (2) They are foiled by wet clothing or conductive fabrics.

The X-Ray kind can see through wet clothing, conductive fabric -no problem.

Good thing I don't work for TSA - I'm sure the above is SSI