The Boost Oxygen Medium Natural 5 Liter is a portable lightweight, and convenient oxygen canister for consumers. It contains 5 liters of 95% Pure Aviators Breathing oxygen and 5% ambient air, which equates to approximately 100 one-second inhalations. The Boost Oxygen Medium Natural 5 Liter oxygen canister makes the benefits of supplemental oxygen accessible to consumers with a patented plastic mask design that allows consumers to take optimal inhalatoins of oxygen at their convenience. Supplemental oxygen supports aerobic performance, sharpens mental acuity, alleviates the symptoms of altitude sickness , and is a recovery aid for hangovers, jetlag,and much more!