Denis Wick Trombone Synthetic Straight Mute A lightweight and easy-to-handle straight mute. The design is similar to a wooden straight mute, and unlike metal mutes, it doesn't sound too sharp, but rather has a somewhat rounded tone. The cork is in good condition without any deterioration, but there may be some signs of use on the bottom. I think this is a rare item among straight mutes. Definitely recommended for those seeking a different tone from metal mutes.