Without the liner, it's somewhat sheer when wet, but the cut of this brief is great. Great tan lines as well.
I take the front liner out so the pick can stretch more. Unfortunately, this means that the white suit is not a public pool suit.
I like suits snug, have 33" waist and wear medium. Black is great for public pools, it's skimpy but only a slightly smaller cut than other thin-sided briefs. I cut the liner out which makes the pouch much more stretchy and comfortable. Even without a liner, it's opaque and doesn't show much more of an outline. Sizing down makes the rear more cheeky.
I even like how these look when they get worn out. These are a few years old with swimming in a pool and going through the washer/dryer. They're stretchier and sheer in the pouch and the rear gets somewhat loose but not baggy.