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O2Trainer Green in Plastic Case ( no mesh net)

Engineered to Increase Cardiovascular Endurance and Breathing Performance , the compact O2Trainer can be used while doing nearly Any Exercise or Activity . If you are running Weight Lifting ,Singing or just sitting down , O2Trainer will enable you to get the most out of every breath for a healthier , stronger performance.  Exersice your lungs while working out , Standing , Lying down or Sitting ! This product is the same as the other o2trainer , Only the packaging is different .

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