Best Brass Trombone Mute Warm-up

A warm-up mute that has succeeded in achieving both the highest level of temperature rise performance of "about -25 to 35 dB" and an extremely light and compact size. The playing feeling is as close to open as possible, the key points in the low range are even easier to grasp, and the pitch is excellent. This is a new category of mute called a warm-up silencer.