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."