This is just to help you understand why in this case we talk of non hazardous special wastes.
For example, a firm that works with textiles produces many types of wastes. Glues, old machineries, oils, chemicals, all of these are hazardous wastes because in a way or another they can influence the environment or compromise the health of the citizens.
On the other hand, clothing parts, textiles, or similars are still a special waste since they cannot be stocked and disposed in the "normal" bins. They need to be transformed and possibly find a new destination of use being recycled, or maybe burned to create energy.
In this case the waste is not hazardous but is still special.

If you have more doubts on the subject, here's the link of a website that I had used some time ago when I needed to translate a similar file.

Hope it helps :)