Streamlined tube reduces vibration and discomfort from tube shift.
Specially Designed Mouthpiece
To better fit the upper and lower profiles of the teeth, the grips are vertically asymmetrical. There are also two sizes, one more suitable for men and the other for women. For most users, fatigue does not build up. Even after using the Canal for hours, still comfortable, you will hardly notice that your mouth has been gripping the mouthpiece.