Evans EMAD Heavyweight bass drumheads provide superior durability and a compressed attack, plus a wide dynamic range and the ability to hone your tone with EMAD. Made with two plies of 10 mil film, Heavyweight bass heads are incredibly durable and allow players to customize the head’s attack, focus, and sustain with the included EMAD foam damping rings. Sonically, these heads have a nicely defined attack, short sustain, and a semi-bright tonal character, making EMAD Heavyweight bass batters excellent for heavy hitters in the rock and metal genres. This drumhead also features Level 360 Technology.