Since 2007. 95% pure. Aerobic performance. Recharge and recover. Altitude & poor air quality. Up to 100 one-second inhalations. 95% pure aviators breathing oxygen. Contents: 5 liters 95% aviators breathing oxygen (abo), 5% ambient air, no aromas have been added to our natural product. Note: oxygen gas is essentially weightless. Full pressurized can is very light. Oxygen directly fuels 90% of all body and mind functions. The average oxygen level in the air is 21%. Boost oxygen is 95% pure aviators breathing oxygen (abo). Professional athletes inhale supplemental oxygen. Convenient. Lightweight. Portable. Please recycle. No cfcs - contains no cfcs which deplete the ozone layer. Proud supporter: national ski patrol. Mp vets.