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

So easy to carry. I have Pulmonary Fibrosis and sometimes, I start to run out of oxygen. This product is great as I can carry both sizes in my pocketbook. It does the job. It works for me! Thank you to: The Great One = Mr Kevin O’Leary

Give you a boost of energy without the jitters.

They were a lot smaller than I thought they would be but they served their purpose

Jury is still out on just how much these help me. I have COPD and I use them while I golf. I carry one in my back pocket and use it if needed while on the green or away from the cart where my portable O2 machine is. I can't say for sure it helps, but I don't think it hurts.

Works great for fast recovery getting your breath back fast