Hi Irthonger,
The quality is very good, amazing considering they are only $6 or 7, good stitching, very soft and stretchy material, slightly transparent and a good sized pouch. I’ve got all the colours they sell, the nude and white colours are probably the most opaque. I’ve bought from Aliexpress a few of times, sometimes the sizes are a little different.
I wear the black colours for work most days.