Flugelhorn SSHMute Flugelhorn Practice MuteThe sshhmute is made from lightweight, yet hard wearing, ABS plastic with no parts to break or fall off and it is sold in a convenient soft fabric carry bag. One of the primary benefits of the sshhmute design is the very small amount of back pressure it creates. This allows for better air supply, while still opening and developing the throat muscles. The mute also remains in tune and faithfully accurate throughout the entire range.