This i would call, "Rainy Days bookmark". I'm fond of fleece material especially in blankets. I have a low tolerance in cold temperature so I would always give credit to the makers of fleece blankets. :D
With this bookmark, my rainy season reading, surely, will be warmer.
Fleece is a general term for a soft fabric (often with a deep pile). Also refers to the woolen coat of a domestic sheep or long-haired goat, especially after having been sheared (but before being processed into yarn or thread)