The Controlled Sound X Coated Bottom Black Dot(TM) features focused midrange tones with added durability. Constructed with 1-ply of 12-mil coated film and a 5-mil Bottom Black Dot, Controlled Sound X Coated Bottome Black Dot drumheads provide heavy-duty drumhead characteristics. The drumhead's outer area offers enhanced tone and sensitivity while the center dot adds durability and overtone control.