Evans Genera HD Snare drumheads 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.

 

Specs

Sound	Good attack, Focused midrange tones
Ply	2 ply
Thickness	10mil film, 2mil overtone control ring
Coated/Clear	Coated, Control Ring
Diameter	13