Boost Oxygen Pocket Size Natural 3L Canister | Respiratory Support for Aerobic Recovery, Altitude, Performance & Health (4 Pack)

I use oxygen at night and sometimes need a little after exertion or while exercising. I carry one of these in my purse and find that it works well when I find myself gasping for air after doing things like getting in the car or going uphill. Usually 4-5 puffs is enough for recovery. I saw a video suggesting that each small cannister holds about 100 puffs.

Nice size. Convenient.

Perfect size for traveling. We kept them handy in backpacks in case we needed them while in high mountain altitude. They worked great.

My husband find these handy and easy to take outside doing stuff in the yard and his shop

Well the most important thing to note is that one of the four cans was empty. 25% missing product is not insignificant at the price. Outside of that, while sick with a respiratory illness and being one with asthma, this did seem to help when I was feeling especially out of breath. I'll need more trials to truly decide how I feel about the product, possibly getting a pack of the larger size. But I didn't notice any negative effects. It tasted of fresh air and seemed to help, if only placebo.