Learning the harmonica can improve your breathing, and thus, your health. By forcing you to breath out and in to play melody, the diaphragm muscle will get exercised a lot. This is why, especially in North America, a harmonica is sometimes given to people with breathing difficulties.The harmonica is also a very portable instrument. The Hohner 270, a 3-octave chromatic harmonica, together with the case, can fit into the inner pocket of an unmodified jacket.Such is the case with the Hohner Super 64 in a tiny daypack. No other acoustic instruments with similar range can accomplish that feat.his is why, especially in North America, a harmonica is sometimes given to people with breathing difficulties. The harmonica is also a very portable instrument. The Hohner 270, a 3-octave chromatic harmonica, together with the case, can fit into the inner pocket of an unmodified jacket.