The outer layer is made of starch, giving it a bit of a paper aspect, while protecting enough. This film can seffriter a bit when the layer is a little too long in place or that it remained too long in place.
At waist level, they are correct on my daughter, who is 12 kg for 97cm.
These are layers that I have tested and bought in the past. I think it is a good compromise for disposable diapers.