3 Pack Large 10-Liter Boost Oxygen Portable Pure Canned Natural Oxygen Canister Bottle for High Altitudes, Athletes, and More, Flavorless…

Works as needed. Kinda expensive.

A great item ,works great. Only problem was ups dropped off at wrong address Was all most two weeks before a woman and told me about it.

I use this more like I do my Inhalers. With my health problems I'll take a couple of hits with it a couple times per day. I counted the shots from the first can and got 104 inhales before it seemed to weak to continue. I have an oxygen meter that I use and my oxygen levels are in the 90% range all the time. I check that before I inhale tho.

Boost Oxygen

Great product - many purposes! Only complaint is this shipment arrived in big box that was pierced open in several places! Use smaller box and pad to avoid movement of cans.