It is a jersey fabric. I normally wear M and S No VPL High Legs under trousers but you can see them under the skirt even thought it isn't that clingy. I'm not a skirt wearer at all but just fancied one of these for hot days.
I'm not fat (but not thin either) and it is the waist rather than the leg that makes the knickers clearly visible. I hate thongs but dont think they would work anyway.
I wondered what others wear? Thanks.