Oxygen Limiter Training Mask

The device looks like a tight mask with built-in valves for inhalation and exhalation, as well as adjustable resistance. The mask is designed for hypoxic training with reduced oxygen supply to the body. It improves the work of the muscles of the respiratory system and overall endurance.

The gadget has one significant drawback - the lack of research on its effectiveness. In addition, the use of such a mask during illness is prohibited.