O2 Blast - Pure Oxygen Supplement - Filled with 99.99% Pure Oxygen to Support Fast Recovery, Increase Stamina & Enhance Focus for High Altitude and Action Sports, 4L Portable Can Flip-Top Cap, 2-Pack

A couple pump make for quick recovery. Comfortable knowing it's close to pure and easily fits into a crossbody phone bag

Anyone who reads this, please understand that I very much dislike writing negative comments about an American Brand and small business, so I don't do this lightly.I've tried other brands of these "O2" or "recovery" type brands of Oxygen and this one just didn't measure up, "for me."I decided to purchase this product due to the image of the O2 content and the compact size containing 4L of O2. They show an image of 99.8% Oxygen but the can itself says it's between 95-99%, so is it 99.8% or is it 95% or is it less?As far as 4L, I'm no expert on pressurized gases, cans and inner coatings, but this product seemed to fall way short of expectations of what 4L of gas should be in light of the claim of 50 breaths which the can claims.The 3 can pack I bought lasted less than One day. I wrote down how many breaths I actually received from the first can. Maybe 10! Only the first 3 were at full depression of the nozzle.What is a breath, how hard do you depress the nozzle and for how long. None of these questions are covered on the directions for use.If you want 50 breaths, do not depress the nozzle to fully, because you will run out after minimal use.So to be fair, all in all these products are for recreational use only and my expectations likely exceeded the purpose of the usage. But claims are claims.

These run out show much faster than boost.. I know they were smaller but it just seemed like they had even less in them then Other cans. Like if I were to take one can of boost, It still felt like it had more than 3 cans of the other product... Other than that I bought these because they had a slightly higher percentage of oxygen and I was just trying to keep my 02 levels up during a 2 week Particularly nasty bout of Covid. To be clear I am vaccinated but not boosted and this was not recommended by my doctor. I just wanted to keep my levels up because I am a former smoker and thought that this would probably help because I carry comorbidities that recommend abilities that could have wound me up in the hospital if if it was any worse. Please don't take this as medical advice. I like to think that it helped I have no proof that it did other than an oximeter showing that my levels did go up a little bit, If that kept me from going to the hospital I have no idea

They're great at a good price

The plastic valve on the can is poorly made and does not deliver the oxygen correctly. Instead, the valve leaks and blows oxygen in all directions.

Very small, doesn’t last long, and a poorly designed mouthpiece… I would not buy again

Yes, I really enjoy this product. I use it once a day and I feel good after each use.

Worked as intended