C4 designed the shape between the mouthpiece and tube to make air passage as efficient as possible and to reduce water residue that can build up during breathing

especially during transport and against any potential bending of the blade

outdoor activities and everyday use

enabling the use of all kind of blades

Druckausgleich - Online Coaching gebraucht C4 designed the shape betweenOnline coaching for all training levels Our training is now available online train comfortably from home. Training on dry land doesn't help? You'll be surprised at the progress you can make with targeted training at home. You have problems with pressure equalization? You can't get past a certain depth? Then it's time to change that! It doesn't matter if your goal is 30m, 50m or 100m together we lay the foundation in our trainings. We adjust the