Beeswift Pro2 OxygenPrO2 Oxygen is a conveniently sized canister of cooled, high purity breathable oxygen designed to aid recovery from various physiologically stressed or impaired conditions. It helps revitalize during periods of physical or mental lethargy and stimulates the body when peak performance is required. The canister includes a blue inhaler cup adaptor, allowing the user to place it around the mouth, press down, and inhale comfortably. What makes PrO2 unique