Although at first they seemed very nice to me, after 3-4 washes I noticed that on some of them the elastic bands in the middle had deteriorated. Very mediocre quality, unfortunately.

3 stars, which is mostly cotton.
By no means invisible, it has very visible thick seams. Get one size larger.

I expected better quality, the seams have started to come apart and they haven't even lasted two months. Personally, I will not buy them again.