Quiet, Comfortable,Clear Sound. Mutio is designed by musicians for musicians. It has surprisingly realistic response, therefor sound quality is not diminished. As Mutio does not stiffen acoustic resonance, intonation in all range is very natural. You can practice "Buzzing" with this new Mouthpiece Attachment. (Design registered) This attachment gives you comfortable air resistance, and the feeling is like playing a real instrument. Of course it works well with Mutio. This combination is the best solution for buzzing practice and warming up. Made with Biodegradable PLA material, Mutio is feather-light and a wide range of color and pattern variation, and so affordable that you can match your Mutio to your mood. (Biodegradable PLA material that is weak in hot place. It can change the shape little by little with some pressing around 60℃. So Don’t put it in the hot place like in the Car, near hot stove, hot warehouse and under sunshine. )