Boost Oxygen Rapid Response Portable Canned Oxygen, Natural, 12L

It works great my oxygen level has dropped low at times I use this since my insurance won't pay for oxygen therapy. I love it really helps when you need it

It costs a bit too much, I feel, because people such as me (who have COPD) need to take far more than a couple of two to three second inhalations! We need to take a few full breaths to benefit significantly and, in that situation, the product does not last nearly long enough for the price that's asked. Still, the product is also great if you live in highly dusty conditions where, not only are you breathing 80% nitrogen/20% oxygen (or whatever the air composition is), but you also fail to get the full value of the minimal percentage of oxygen, because the oxygen you do take in is combined with and obscured by the extreme, unhealthy dust levels. I myself, having lived into my 50s with no lung problems, developed both asthma and COPD as a result of having to live now with unrelievable and extreme dust. So the product is terrific overall, and the large size reduces the frequent need to re-purchase O2 canisters. The pure O2 is an outstanding relief if you are out of breath. And, it's a great support for asthma and COPD patients. If you happen to be among the latter, however, be conscious of the fact that the product will do you little if any good if you have not first used your medication(s) to open your airways and/or to enable better functioning at the level of your alveoli and pulmonary capillaries.