Reduces volume by up to 95 percent Mesh material provides the same feel and response as a normal drum head Can be used with drum triggers/drum module Made in the USA. - The Evans 22'' dB Zero Bass Drum Head is ideal for low-volume practice or electronic trigger setups. Made using a single ply of a unique mesh material, it reduces the amount of volume that the drum produces up to 95 percent. This mesh material makes the drumsticks bounce back the same as a normal drumhead would. Available in a variety of sizes.