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

Little expensive for the amount of O2 provided.

Great product, handy size

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.

Purchased for surgery recovery.

I used this product on days with bad air quality. I keep one in my vehicle and one in my golfbag. There is no smell. Oxygen in these cans are orderless and colorless.