Includes both Super-Kick I and Resonant heads to provide deep focused sound and customizable muffling for your bass drum. Super-Kick I A clear single ply medium-weight bass drumhead the Super-Kick I also features the Floating Muffling System. A narrow felt muffle ring is attached to the backside of the drumhead to produce a low-end well-defined punchy sound. Regulator Bass Drum Head This is a resonant head featuring Aquarian s patented Floating Muffling System.