They look and feel to me like some form of tissue (actually, "non-tissued tissue"). They seem to absorb what I put on them (PEC-12 or, more often, Tetenal Graphic arts cleaner) just as a cotton rag would do. Actually I was convinced they were made of some form of tissue (considering the cost that in fact should not have been likely). I have no idea what are they made of, maybe cellulose, but it looks and feel to me like tissue, not like paper. I never tried to put on them something else, though. Thinking about it, they look like those "fake sheets" they give you in trains when you travel on sleepers, a one-use "non-tissued tissue".
For cleaning lenses, I use air, a blower brush (more the blower, than the brush). The brush of my blower brush has a cap on it to protect it from dust. And one can always wash it with water and soap when needed.
When there is a fingerprint on the lens, after blowing air I just breathe out over the lens and then clean it with a common paper handkerchief, which is taken "new" out of its packet, and I clean the lens with circular motions starting from the centre and spiralling outwards.
I bought decades ago some Kodak Paper stuff (small paper sheets) to clean lenses, which I basically never use because by tactile sensation it feels "hard" on the lens. I prefer paper handkerchiefs.
I never use protective filters on lenses. I always put a cap on lenses before putting the lens, or the camera, back in the bag. I find very little cleaning needs with this method. I only take pictures in urban situations.
I understand putting protective filters on lenses when going to the seaside, or when hiking etc. For the normal town walk I just prefer the best optical quality my lenses can give me.