Oxygen is life. Air also contains oxygen. Air is made of many gases that are mixed together. Approximately 21% of the air is oxygen. Oxygen is especially important because all animals use oxygen to get energy from their food. Canned Oxygen + can help fight fatigue, stress, loss of energy, jet lag, and lack of focus that can be caused by physical activity, stress, poor air quality, travel, toxins and many other factors. Pro Athletes regularly use supplemental oxygen. Oxygen is also commonly used by mountain climbers, weightlifters, spas, universities, casinos and hotels worldwide for a variety of benefits both physical and mental.