The Attack Proflex1 Black Ported No Overtone bass drum head provides just enough control for resonant bass drum tones. You'll achieve rich, dynamic bass drum sounds with this single-ply head, crafted for drummers seeking quality and performance. The Proflex1 gives your bass drum note definition and focus while allowing its natural resonance to sing through. You'll get articulate kicks and a wide tuning range to suit any music style.