omtex Fitness Mask contains adjustable resistance valves allowing you to control the altitude resistance level to suit your progress from 3000 ft. to 18000 ft.
The mask restricts breathing which makes people feel like they are at high altitude. It basically gets people out of breathing which makes people feel like they are at a high altitude. It basically gets people out of breath sooner than normal. However, the composition of air remains the same as it is when you breathe without the mask. It helps condition the lungs and strengthen the diaphragm, thereby increasing the overall lung capacity and improving oxygen intake. It also claims to increase mental focus and decrease workout time. For the same reason, it is used by athletes during fitness training.
The high-altitude mask or elevation mask not only makes the workout efficient, but also conditions the lungs and makes them work harder. When lungs work harder, the stamina and energy levels improve.