Boost Oxygen Medium Natural 5L Canister | Respiratory Support for Aerobic Recovery, Altitude, Performance & Health (1 Pack)

Easy to use. I prefer the 5 liter size over the ten because the smaller size fits in my handbag and many pockets.

It's alright. I suggest purchasing the larger canisters, the smallest size does not last too long at all. I use it for my radiation / chemotherapy treatments, Helps with the pain.

I've been using Boost Oxygen Medium Natural for a few months now, and it's been a reliable pick-me-up during workouts, hiking, and even when I'm just feeling a little sluggish. The canister is lightweight and easy to carry, which makes it perfect for taking on the go. The oxygen itself feels clean and gives me a noticeable boost in alertness and energ, especially at high altitudes or after intense activity.The only reason I'm giving it four stars instead of five is that the can doesn't last very long if you're using it frequently. Still, it's a great product to have in your gym bag or travel kit for those moments when you need a quick breath of fresh air.Definitely recommend for athletes, travelers, or anyone needing a quick oxygen refresh.

Was as expected. Very happy with the product. Shipment was on time.

Oxygen is weightless, and these are small, so great for carrying on hikes at altitude.

I'm a very big & tall guy (6' 9" & 220 lbs), & have spent the better part of 25+ years exercising (both wt. lifting & aerobics), all the while struggling with lung & O2 issues I've had since birth; meaning that no matter how much cardio I do, I will still fall short of those without this condition.I've used O2 tanks (the heavy / hospital variety) & have been on steroidal inhalers to help increase my O2 when exercising, & each of these methods have proven quite effective in maintaining my endurance along-side those who don't have this condition. This said, the prospect of an ultralight O2 delivery method was quite appealing (even over the inhaler). Alas, it's all smoke & mirrors.For those who swear by this product, I'd also like to mention that in hundreds of thousands of case studies, where a placebo was used, the placebo would occasionally perform just as well as the controlled product; e.g. "mind over matter". In my case, since I have a REAL O2 delivery system (e.g. the med-ox regulator), I can compare how it works to this product. Even when using a foam seal (made from pipe insulator) to help "seal" the rim of this product around my mouth, I feel no different than when I breathe without it. By contrast, after running for 30m< &/or huffing & puffing during &/or after an intense cardio workout, both my "O2 tank" & inhaler offer me near-instant O2 relief (with the O2 tank offering my more "satisfactory relief", faster; hence why this product seemed more appealing than my inhaler). Add to this that when I check my pulse oximeter after an intense workout & use my tank or inhaler, my O2 levels out (to normal) pretty fast. My O2 didn't increase OR level out with this product, but rather decreased (I think b/c it is NOT "pure oxygen", & by putting it on my face, thus restricting my high-volume breathing, actually decreased my uptake).In short, if this works for ya... great. But for those looking for a REAL O2 boost, I'd say stick to O2-restrictive masks (e.g. build your endurance the long & steady, but true, way); adjust your diet to accommodate better red blood cell creation &/or O2 uptake; look up breathing exercises; consider a small, light-weight (1< lb, 25 LPM) O2 tank, to use during or after an intense workout as "recovery O2"; &/or talk to your doc about how to boost your blood O2 (especially if you have O2 medical conditions; like me).The take away..............................?It's a nice concept, but ridiculously fails, as it is NOT "95% pure O2", like the manufacturer claims. In a nutshell, you are spending $10+ for a nice-looking, brushed aluminum can... filled with the same level of O2 you can get by stepping outside. For all intents & purposes, you could take a large garbage bag & "capture" the outside air & breathe from that while working out to get the same effect as breathing from this can (for my own "control test", I actually tried this, lol; & both my pulse oximeter & O2 gas detector reflected this result as well ~ just as other reviewers have stated / shown w/ pics).

I was hoping for something special, which it wasn't. Some boost of energy, or some new clarity of mind, nope it wasn't.Good old fashion yoga breathing, will do as much or more than Boost. Sorry to say.

life saving