American Red Cross Rapid Response canister is an all-natural respiratory support product for aerobic recovery and performance. Simple and safe to use, the Portable Oxygen Canister provides supplemental oxygen wherever you need it. It is 98% pure and concentrated supplemental oxygen which is nearly 5 times the amount of oxygen we breathe in the air alone, which is only 21% at sea level. Supplemental oxygen has always benefitted so many people for so many different reasons. From altitude acclimation to athletes to anyone looking for a way to catch their breath. Convenient, easy-to-use, and portable, the canister is safe with no chemicals, propellants, or side effects and available to everyone without a prescription. It is an excellent choice for first responders, outdoor enthusiasts, home/business first aid stations and people who live in areas with poor air quality. People with trouble catching their breath love the accessibility as well. It can help you feel energized and refreshed with just a few breaths. Feel better, recover faster, and improve performance with the American Red Cross Rapid Response 98% Concentration Supplemental Oxygen canister. Manufactured by Boost Oxygen®, the worldwide leader in supplemental oxygen canisters since 2007.