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The Official Bas Rutten Inspiratory Muscle Trainer.
Experience a new level of endurance !
Use during athletic training or as a stand alone breathing exercise .
Strengthen Your Lungs & Diaphragm , Increase Airflow , Be Ready To Perform at any Altitude.
Better than Training mask, proven !!!
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I always had problem with my breathing during my heavy training till I found out about o2 training and I watched lots of review and since yesterday I start using it and I have to say is new experince and i never felt that much air in my longs before and I'm so happy I desided to use it, thanks