Evans 13" clear Genera Resonant drum head produces a full sustain suitable to many genres of music. Evans clear Genera Resonant drum heads produce a full, round sustain with strong upper-mids that increase projection without sacrificing sustain. They are ideal for enhancing tone when combined with a 2-ply batter head. 13" resonant drum head made using a single ply of 10mil film A single ply offers an open and expressive sound Ideal for enhancing tone when combined with a 2-ply batter head All Evans drum heads are designed, engineered and manufactured in the USA