After extensive research and clinical testing from the UNIVERSITY OF NAIT the Training Mask 2.0 has made remarkable advancement in the fitness and training industry. Training Mask 2.0 takes all the amazing "Diaphragm Resistance Technology" from Training Mask 1.0 and compiles it into a less obtrusive, amazingly comfortable silicone mask that fits over the nose and mouth.The Elevation Training Mask 2.0 is the ultimate respiratory training device. Our multi-level resistance system reduces air flow through our patent pending flux valve system. Training Mask 2.0 promotes increased lung capacity by forcing you to inhale fuller deeper breaths. When your body adapts to the resistance your lungs will be trained to take deeper breaths and use oxygen more efficiently.While using Training Mask 2.0 the conditioning of your lungs significantly increases along with endurance and diaphragm strength. Training Mask 2.0 will benefit your respiratory system as your overall cardio and endurance will improve with continued use.