Evans MX1 white marching bass drum heads produces a bright, focused, and full tone with a single ply of 10mil film. The MX series includes a unique tone damping system that can be manipulated by applying individual felt arcs (included) to enhance articulation and focus low-end for both indoor and outdoor marching. For over 60 years, Evans has been an innovator in drumhead manufacturing and design. As the creator of the first synthetic drumhead and other revolutionary products such as EMAD, Hydraulics, and the UV1 series, Evans drumheads are designed with the intent of solving problems for drummers. Regarded for high quality and consistency all Evans drumheads are made in the USA and feature Level 360 Technology., 18" drum head with a single ply of 10mil film, Bright and full tone, Unique modular foam arc dampening system is easily manipulated, Also available in a black version, All Evans drum heads are designed, engineered and manufactured in the USA