Evans‚Ñ¢ Genera‚Ñ¢ HD‚Ñ¢ Snare heads feature two plies of film.

An outer ply of 5mil film and an inner ply of 7.5mil film, in combination with a 2mil overtone control ring on the underside that "floats" with the head, eliminating excessive overtones and controlling sustain.