We call it Window lichen and pick it to decorate flower pots outside or the the candlestick during Christmas. I like the chubby look of it and when it's wet it's quite soft. But I know others who love it even more as the lichen is an important feed for reindeers. It happens that this lichen is called White moss here but that is a mistake because ....
this is the real White moss, and as everybody can see it looks quite green. But I think the explanation is that when you squeeze it and let it dry from water it looks more white.
When it's dry it's both antiseptic and has a very good capability to absorb fluids. So it has a been used as diapers and sanitary napkins long before anyone went to the supermarket to buy these kind of products.