What kind of didgeridoo works to treat sleep apnea and snoring?

Any didgeridoo that plays easily and gets a clear consistent tone will work to treat sleep apnea. In the original study published in the British Medical Journal, a plastic didgeridoo was used in all trials. The 4-piece travel didgeridoo that comes with the Didge For Sleep Introductory Package is ideal for new players because it is lightweight and portable, maintaining a clear and loud sound that has been tested and approved by many seasoned didgeridoo players.