The underwear is nice, well made and was shipped fast. I took size XXL, and it seems to fit me well - about US size 34. These are briefs types, and unlike the boxers, have elastic bands which mitigate any problems with the silk stretching after an hour or so. The material is thin, I would not describe it as transparent but the darker colors help with this regard. If washing in a washing machine, you should always use cold or slightly warm but not hot water, and put inside a mesh bag or pillow case, otherwise these briefs will be destroyed after few washing cycles - they develop holes.
good, a bit too thin and legs cutouts are huge, don't quite fit like in photos