Product Information: Evans Genera Dry snare drumheads feature a single ply of 10mil film, plus a 2mil overtone control ring on the underside that floats with the head, eliminating excessive overtones and controlling sustain. Precision-drilled dry vents around the perimeter of the head further reduce overtones and sustain. Product Features: Evans Genera HD Dry snare drumheads feature precision-drilled dry vents around the perimeter of the head reduce overtones and control sustain. These drumheads contain two plies of film, an outer ply of 5mil film, an inner ply of 7.5mil film, and a 2mil overtone control ring on the underside that floats with the head, eliminating excessive overtones and controlling sustain. The HD Dry model incorporates Evans Level 360 Technology for ease of tuning, extended pitch range, and optimum quality of sound. Evans Snare Side 300 drumheads are the best-selling model of the Evans Snare Side series. This drumhead features a single ply of 3mil film, designed to provide all levels with a wide dynamic range and controlled snare response, incorporated with Evans Level 360 Technology for ease of tuning, extended pitch range, and optimum quality of sound.