AR Resonance First Aid - Wayne Bergeron Promo

Wayne Bergeron tested the AR Resonance First Aid while in Luxembourg at the Make It Brass Festival.
He has used it since along with some other amazing players from all around the world like Sergei Nakariakov, Chris Botti, Fabrizio Bosso, Jose Sibaja, Trent Austin, Tero Lindberg, Glenn Van Looy, Alan Kaplan and many others.
Check it out: www.arresonance.com/firstaid
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[@adrianbarranko9030]

Hello one question.
What material is first aid made of by teacher Wayne Bergeron in this video?