The Super2 is a clear two ply head with great attack, projection, and depth. Aquarians Vaccum Tuned process reduces air trapped between the combined 7mil and 5mil plies for a more musical 2 ply tone. The patented Safe-T-Loc hoop prevents the head from slipping, and the Sound Curve collar design provides "Responsive Tuning." With Aquarian's Vacuum Tuned process, one turn of the drum key and the Super-2 head react like a warm, single ply head.