I have been using the AirMag for over 2 years, and I truly cannot exercise without it! It has significantly improved my ability to maintain nose breathing throughout my workouts, particularly during heavier lifting sessions. Recently, I lost my band, and I tried going to the gym without it. I noticed a big difference. My workout was terrible, breathing was off, and it really impacted my performance. I was also very distracted trying to focus so much on my breathing - with the nasalflow, it feels...