How to prevent hyperventilation?
Come out an attack with HyperFree
The HyperFree® inhalation cassette is a medical device used to treat hyperventilation. The HyperFree® helps you overcome or prevent a hyperventilation attack quickly and safely.
Review
Recently ordered and actually liked it. I have had much benefit from recent times. The device looks small and simple, but the result is there. In addition, it just fits in my pocket.