The Denis Wick Fiber mute is a low cost mute with a high quality sound. Unlike other fiber mutes, this mute uses a high quality fiber combined with a wooden bottom creating excellent intonation and tone quality unmatched by any other fiber mute available.
I was attracted to this by both the Denis Wick brand and by the low price. I use it with a Bach 36B. Tone is good, but it tends to fall out unless I very firmly push it into the bell (and by firmly, I mean really hard).