Evans EC2T series features two plies of 7mil film with optimized attack, tone, length of sustain and ease of tuning for each size head. The Sound Shaping Technology (SSTT) Edge Control ring mounted on the underside delivers an extremely well balanced andpre-EQ'd sound across the full kit by varying the size of the ring for each different head size. The frost coated version delivers additional warmth, focus, and depth, plus a unique translucent appearance.