a single layer of the nylon in that suit virtually disappear when wet. The double thickness areas turn transparent. They are not suitable around families or public pools. A friend described mine when wet as "A see thru g-string"

Even with the so-called lining, a white AussieBum is virtually see through when wet. The lining doesn't do much, obviously. This is NOT a suit for every occasion. Granted, there will be some occasions when its opacity is a perk...

I have a speedo that is red, but white in the front. I love the look and it does get very transparent when wet!