Hello anna1991, thank you very much for your question. You had to wait longer for our answer, so we apologize for that. The M-Check is a sustainability scale that is printed on all Migros own brands and labels. From M-Budget to M-Classic to Migros Sélection, the scale rates the various dimensions of sustainability such as climate or animal welfare from 1 to 5 stars - similar to a hotel rating. As Lamina has already mentioned, ratings below 3 stars are therefore also possible. Kind regards, Matteo