Evans Resonant EMAD series (REMAD) features 7.5-mil of single-ply black film. The unparalleled industry standard EMAD damping system combined with an internal fixed ring provides controlled overtones. The 4" offset mic port features a plastic sleeve that focuses pitch and enhances attack while providing protection for the port. All REMAD series heads feature an extremely durable second generation plastic sleeve. 22" resonant drum head made using a single ply 7.5mil film A fixed, internally mounted black plastic control ring holds in place a foam damping ring that controls overtones The 4" offset mic port features a plastic sleeve focuses pitch and enhances the attach while providing protection for the port The perfect resonant head for use with the EMAD series batter heads All Evans drum heads are designed, engineered and manufactured in the USA