Aquarian Super 2 Clear with X-Ring. They have great attack, projection and depth unlike any other drumheads. The patented Safe-T-Loc hoop prevents the head from slipping and the Sound Curve collar design provides "Responsive Tuning". With Responsive Tuning, one turn of the drum key and Super-2™ heads react. A free tuning sheet is enclosed with each Super-2 drumhead. Focused, warm and punchy.