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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 OxygenEDIT: 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.

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 BoostI would recommend Evolve o2.

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)

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.

I purchased the two can kit, but when I received it today, I was very disappointed that it contained only one mask and hose. This purchase was to be split between my home and work. This can not be done because of only the single hose and mask.

Did not spray when depressed, even though the can was obviously full. When I tried to use the item and it didn’t work I got online and discovered that it was out of time to return or refund. I would think a defective product could be exchanged. Unfortunately there is only was AI customer service prompt with certain choices.***7/19/2024.I would like to say that once someone read my review. They offered a full refund. The can that we did use was exactly what I wanted and worked perfectly for my husband. My former review was regarding the customer service and not the actual product quality. Evidently they really keep up with their customers and reviews. Very pleased with their response. ***

Comes out too slow to be useful. Doesn’t work as one would expect. And your fingers will kill you after just a few minutes of pushing on the valve to keep it open.3/30/25…..After contact from Evolved CEO a new product was shipped to me that worked better for my purposes. I thank them for their concern of my behalf