Vandoren's ZZ reeds feature a unique relationship between the heart of the reed, where the tone is produced, and the thickness of the tip, which is responsible for vibration. The result is a reed with extraordinary tone, with immediate response in a free-blowing manner - even in the altissimo range. Professional saxophonists like L.A. recording artist Gary Foster, Delmark recording artist Frank Catalano, and many others have switched to the ZZ reed for their performances and recordings..