O2 Blast - Pure Oxygen Supplement, Portable Can Filled with 99.99% Pure Oxygen with Custom Breathing Mask, Energy, Performance, Fast Recovery Time, Ideal for High Altitude & Sports - 10L, 18-Pack

I don’t use my oxygen collector when I’m sleeping if I wake up and I’m winded I take a few hits and I’m fine .

I agree, spend the extra money and buy Boost Oxygen. These "10 liter" cans have about one third the oxygen of Boost 10 liter cans (That is bs copied from another review they have less then that and may not even be much O2). I'm not specifically promoting Boost, other suppliers may have good products, its just that Boost is the only other oxygen product I have used, and it is FAR superior to this product. IMO these are a total ripoff.I confirmed that they are under filled and not sure there is any O2. Tried it with O2 meter and it never went up at all no matter how long I tested or how many breaths I took. Boost on the other hand did raise my O2 meter reading after 5-6 regular breaths. Some cans were completely empty too. Looks like a good deal but it is not. These are the facts!!! You are welcome for saving you the rip!!!

Great for what i needed it for

My husband was using these quite often about 2 a week so we decided to buy a large quantity plus some others. He had about 50 cans. It seems about every 3rd one has nothing in it. Now don’t have all the shipping pkg. to send back. Big waste of money. Buy small amount and keep packaging. That way you can easily return

spend the extra money and buy Boost Oxygen. These "10 liter" cans have about one third the oxygen of Boost 10 liter cans. I'm not specifically promoting Boost, other suppliers may have good products, its just that Boost is the only other oxygen product I have used, and it is FAR superior to this product. IMO these are a total ripoff.