A 10 mil single-ply with the fat spread of a double-ply, the Evans Genera Dry Vented Coated Snare Drum Head has small vents around its perimeter for an amazing sound.
A 2 mil overtone control ring on the underside of the Genera controls excessive overtones, promotes a shorter sound, and equalizes tuning. The addition of small vents around the perimeter eliminates additional overtones, stray harmonics, and creates a more focused sound.