How does O+ define a breath and a “deep” breath?

We generously define an O+ breath or a “deep” breath as equaling approximately two seconds long. The way other recreational canned oxygen companies define a breath varies. Some define a breath as one second long. So, keep this in mind if you’re shopping for oxygen products. You might be interested to know an accurate way to compare products is to look at the volume of oxygen per canister volume – or the price per liters (liters) in a canister. Oxygen Plus products offer more oxygen per can volume than any other canned oxygen of comparable-sized canisters on the market.