The new Aquarian SKI20 Superkick 1 Clear 20″ 1-Ply Batter Bass Drum Head features a narrow muffling ring. It is approximately 1/2 the width of the ring used on the Impact bass drum heads. This new ring allows the drumhead to produce more low-end, more punch and more volume than any other pre-muffled bass drumheads. The Floating Muffling System is made of felt for a pre-muffled yet natural sound. The felt moves and breathes with the drumhead. This drumhead sound BIG!