Features of this innovative leather mute include · A unique slot and notch design that allows you to easily produce two distinctly different muting effects. · Our all leather mute preserves the distinctive tonal qualities of your instrument. The player is better able to hear the ringing of the overtones under the ear, resulting in improved intonation and a superior muting quality when compared to rubber, wooden, and metal mutes. · The mute can be custom fitted to your instrument. Moisten the two small notches with a drop of water and then place the mute back on the strings. During the drying process, the notches will conform to the string dimensions of your instrument. Do not forget to personalize your mute by adding "custom engraving" to your cart!