Boost Oxygen is 95% pure supplemental Oxygen To Go, no prescription needed. When you want all-natural respiratory support, Boost Oxygen is the #1 best-selling, most trusted brand. The health benefits of oxygen are undeniable. Boost Oxygen has made these benefits readily available in a convenient, lightweight, portable oxygen canister that is 100% recyclable. Oxygen fuels cellular functions that provide energy to your body and brain. However, the air we breathe only contains around 21% oxygen, with the majority being 78% nitrogen. Boost Oxygen provides 95% pure Oxygen To Go! With Boost Oxygen “Help Is Here” for athletes, senior citizens, students and those at higher altitudes for safe, all-natural energy without stimulants or sugar. Now offered in three sizes: 3 Liter Pocket Size (60 one-second inhalations – enough for a day trip or “on the go” and includes our popular mouthpiece), 5 Liter Medium (100 one-second inhalations – recommended for daily home use) and 10 Liter Large (200 one-second inhalations – recommended for weekly home use).The product and statements about the product have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. For Recreational Purposes Only. Boost Oxygen® is filled with Aviator’s Breathing Oxygen (ABO) and not Medical Oxygen. This product is NOT for Medical or Prescription use. Refer to the product label for more information.