What is non woven material for the bag?

The term NO WOVEN states that the material of the bag is NOT made by the knitting - weaving method.

That is again polypropylene (with the characteristics mentioned above), but made in a different way:

NON WOVEN are multiple layers of polypropylene sheets or tissues that are interconnected by mechanical, thermal or chemical interconnection. They are flat and usually porous sheets made of molten polypropylene. They are not manufactured by weaving or knitting (such as WOVEN PP) and therefore do not require prior conversion to fibers or yarns.