This is a great addition to my 2 year old's toddler room. However, it did come with some pokey wood type material woven in. I removed what I could find, but am assuming this is the "natural fibers" in the product description. It's not as soft as I was hoping, but it's not too rough either. There is considerable ribbing so it's not super flat, but it is thick so it quiets our squeaky floors.