Evans MS1 22" White Bass DrumheadEVANS MS1 White Marching bass drumheads offer a traditional single ply, 10mil film without muffling, providing the widest range of damping options. The MS1 series is very durable and projects warm, musical tones both indoors and out. Made with a single ply of 10mil film. Bright and resonant tone. Traditional sound and feel. May be used with any variety of internal or external muffling techniques All EVANS drumheads are designed, engineered, and