Elevation Training Mask mimics the effects of High Altitude Training. When elite athletes want to improve their performance they go to high altitude levels to train. When they come back to sea level they perform much stronger, faster, and have increased endurance. Training Mask 2.0 makes your work out more efficient allowing you to take your work out from 60 minutes to 20 minutes. From the average daily walker to the marathon runner, Training Mask 2.0 appeals to every athlete who wants to improve their overall health and performance.