usually works

If you have materials with plastics content (eg even with a sweatshirt 80% cotton 20% polyester), then rapidly small Knübbelchen form on the surface. These can be removed very well with this little device eg in a sweatshirt. The course takes a little. Attention to sutures, there can sometimes even a thread to be cut if it is loose.
The container is not too big but ok. Depending Knubbel infestation it is enough for a sweatshirt. In a pure polyester pants I had to empty three times.