A corduroy fetish is a sexual preference for or arousal by corduroy material. The fetish can hinge on the feel, look, or specific objects made of corduroy.
Kinkly explains Corduroy Fetish
For an individual with a corduroy fetish, the arousal may be general or very specific. The arousal can stem from the feel or texture of the material or from the look of it. The fetish might be specific. It might include only other people wearing the fabric in the form of pants or a fetish for other objects made of the material. This might include everything from corduroy bears to couch cushions.