I don't know, but it's pretty standard weight for a basic black gabardine. I want to say it's 3 season weight? Like I said we had taken a Dior Homme basic suit and a Raf basic suit down to the market to use as a baseline for the fabric and the black gab we chose is pretty close, close enough that the TOJ's could sub for the pants in those suits pretty much. Texture and finish, weight, very similar. We bought it in Korea but it's imported Japanese 100% wool.