The Evans Genera HD Dry snare drumhead offers an aggressive rimshot with a balanced response. A durable 2-ply head - 7.5mil external, 5mil internal - the Genera HD Dry features a 2mil overtone control ring. Whats more, small vents around the perimeter help to eliminate additional overtones, while focusing the sound. The Genera HD Dry is great for both live work and studio work.