The Training Mask 3.0 Performance Breathing Trainer is a cutting edge respiratory conditioning device that will take your workouts and fitness to a whole new level. Training Mask 3.0 is powered by the revolutionary NXT FORC3 air flow platform which was precision crafted to apply variable levels of load to the respiratory muscles via dial-able air flow adjustment. Performance breathing with the Training Mask 3.0 makes your respiratory muscles stronger and more efficient; this gives you access to unparalleled workout stamina, endurance, and recovery. Defeat training fatigue and stay stronger longer with the Training Mask 3.0.