Made of cotton, but you can also manage the amount of water deposited by the mops on any type of floor.

I asked Narwhal and here is the answer:
"The wipes are actually made of both cotton and a nylon/polyester blend, which ensures both softness and a certain amount of moisture. The nylon/polyester blend has an exceptional ability to absorb dirt from the outside and serves well after long-term use. At the moment only this type of wipes is available on the market. "
I have parquet myself (not oiled) and it works well...