The Phantom Training Mask is a resistance breathing device, which limits your air supply during training. Our innovative Phantom Regulation System lets you regulate the resistance in 4 levels during your workout and without taking off the mask. For most athletes, training their breathing muscles with a resistance breathing device is something completely new. Here you will find everything you need to know about our innovative Phantom Training Mask. We explain all the different parts and how they perfectly intertwine to bring you a new training experience!