www.boostoxygen.com/

great.

THis works for me during allergy or fire season or after a long hike!

I bought this to help with shortness of breath after physical exertion. It seems to shorten the period of time that it takes to catch my breath and be able to continue on.

really helps with my copd

It came in a nice package, and I had no problems with the order. I will order more soon.