Very good quality, thick material, doesn't see thru. Bought XL for Europenean L, fits good.
The leggings are of great quality, very stretchy and comfortable. As described and well packaged. My parameters are between S and M and I took M and they fit great. I would definitely recommend sizing up if you are in between sizes because they are a bit tight around the thigs, but they are stretchy so it is not uncomfortable. Very great tummy control and not too tight around the belly.