FDBRO fitness and training mask is a great product that can be used in the gym, when you are biking/cycling and even at a exercise or sporting event. Its lightweight and comfortable, comes in different colors as well as..
- Conditions the lungs by creating pulmonary resistance
- Strengthens the diaphragm
- Increases surface area and elasticity in alveoli
- Increases lung capacity
- Increase anaerobic thresholds