The first fully adjustable trumpet straight mute. Designed at the request of professional trumpet players who enjoy the intonation and ease of playability of Soulo Mute's metal straight mutes, but require a softer sound. Intended to be used for soft classical passages when most standard straight mutes are too loud. The signature perfect intonation of the Soulo Mute Brand! Lightweight and easy to play. Adjustable - You can find the perfect "sweet" spot for your own trumpet!