EVOLVE 35-Liter Pure Oxygen Canister with Mask and Tube | Portable Oxygen Can | Ideal for Home Use and Outdoor Activities | Designed by Firefighters | Made in The USA | Pack of 2

The product is not reliable for an emergency where forced or high pressure oxygen breaths are needed. The pressure from can is low and maybe sufficient for recovery breathing; slow, deep breaths. For shortness of breath or trouble breathing where a high pressure forced air is needed, I would recommend Boost Oxygen EDIT: Merchant responded to review and offered me to option to try the flip top version of their product which has a high pressure discharge. Their customer service is exceptional. EDIT: Received flip top version of product and it has a high pressure output like the Boost brand. The release valve takes some getting used to, it is sprayed directly into mouth, no mouth piece. The flip top does keep the valve covered and clean whereas the mouth piece cans, like Boost, may have to be cleaned off before use.

Bought to canisters for my elderly, disabled aunt who just lost her sister. Opened the first canister, and the button was not only hard to press or my Septuagenarian aunt who just lost her sister/roomate to cancer. She has been difficulty breathing in the morning and if she exerts herself a little too much she has a hard time breathing. I eventually couldn’t press it anymore and tried to remove the button to the valve, and it seems stuck. We opened the other large bottle, that seemed easier to press at first. Now, with barely any use- she is not getting much or anything out of the second one. She used to buy much smaller canisters at the store that lasted longer and expelled air with more force. I tried to return them immediately after the first one failed, and was told that it was not something returnable through Amazon. Figuring the first one was a fauly product (funnily enough, I work in QC at the largest auto factory in California and sign off on all sorts of potentially dangeous problems as being safe for customer use on the road. Seeing the QC sticker on the top of each can gave me some hope- I soon realized they are either making an inferior product and do not care about the HEALTH and SAFETY of their customers, or this was just a really bad batch. From the other comments, it looks like I am not alone. I spent over $60 on two huge cans that are useless and not returnable. Putting out shoddy medical products that could save someones life is BEYOND irresponsible. I would like this to be made right. I don’t that will happen if I am sent a set of another canisters. This is a design flaw on your part- did you not think weak people would have to push down these impossible to push buttons? The one that some still comes out of is getting more difficult to extract from the can, and the airflow is pretty terrible. She says she barely feels anything coming out. Don’t get me started on the mask. We will be pursuing a small, portable, adjustable open valve machine that she can wear in each nostril- rather than wearing that stuffy mask and trying to such whatever “air” which should feel more like pure O2, but feels no different than taking a whiff of our 70% nitrogen air outside. Being this is Los Angeles, a good amount of our particular atmosphere is most smog and other emissions.

After spending 3 days camping out in the smoky open air after evacuating our house for a forest fire I became short of breath, mild hypoxia due to advancing age I believe. Starving for oxygen feels terrible, this product is a bit expensive but any person gasping for air would be glad to have it on hand. We keep this product for emergencies for ourselves and our pets. The product is very effective and easy to use.

Was a bit difficult getting oxygen concentration up, hard for my husband to push the button, so I had to while driving. But better than none at all

The first can came with very little o2 and pressure. I contacted the seller and exchange some messages and then they sent me replacement. The replacement was full would flow excess of 10 liters per minute, but was able to control output with button. I purchased because of the 35 liter size. I ordered Boost 10 liter before but they only got me 4 or 5 shots before empty. So unless you want a big o2 shot like Boost I would recommend Evolve o2.

My original Review: "Terrible experience. Despite displayed as having more than other brands, there is a lack of propellent in so far it stopped working after a few uses." After posting my dissatisfaction, I immediately received a pro-active refund from the CEO - Joe, who contacted me with concerns for the product. As it turned out, it was not a customary experience it appears, but possibly a defect of sorts. I've changed my rating due to this measure as integrity in todays market place in a rare virtue, so when it is proactively displayed, it should be honored with recognition. If my experience is common - this would be a good company to interact with as needed.

Update this company went above and beyond on getting my issue resolved even thru the holidays. Terry did an excellent job on rushing a new order out to me. They responded within 12 hours of contacting them. Looks like the buttons might have been damaged during shipping. New ones were much easier to use. Thank you. I would agree with most people on here. Bought these for my wife to help bring her oxygen levels up. She used it last night for a few intermediate hits and there was no more charge left to it after 2 to 3 inhales nothing even made it to her lungs to make any difference. Not worth the price that you pay. I was hoping this product would work since it was invented by firemen. Boy was I wrong. We are in a climate where oxygen is a must for most people. We have a big circle of friends who we will tell not to waste their money on this product.

Good luck trying to take a deep breath of oxygen, the mask has many cutouts for a reason. If you block the cutouts on the mask to get nothing but clean oxygen from the can then you find that it takes up to TEN SECONDS! to take a breath. That is how slow the oxygen flows out of the can. This is a rip off and does not compare to the pressurized oxygen cans. Who cares that it SUPPOSEDLY has more oxygen. if it comes out as a trickle out of the can..... They trick you into thinking you are getting good air by letting you breathe the outside air trough the holes in the mask.... They also make the sound of the oxygen flow loud but the flow itself is very very slow. If you are suffering from bad air quality and need to get a breath of clean air don't get this thing, get the regular pressurized cans. Yes they have less in volume but it comes out very fast. Im staying away from this brand hence forth due to other possible issues with their other products.(will try for a refund)