DealmedNon-Rebreather Oxygen Mask – Oxygen Face Mask with Adjustable Nose Clip, Clear Finish, Adult Size, Suitable for Doctors, EMTs, Hospitals, and First Aid Kits (10 Count)

Works well as they should!

For the price these are great. But compared to the highest quality they are not the best.I'm no expert... We're simply using them for a soft hyperbaric chamber connected with an oxygen concentrator that goes only up to10 L per minute. I feel it would be easier to breath in these with15 Lpm but I don't know what the implications would be with that and that amount of O2w which is maybe reserved for emergency situations. The reservoir bag fills up just fine. The valves are simple little rubber flaps and may not keep all outside are from coming in but with the concentrator at only 10 and the impeding pressure of the HBOT on the incoming O2, a little outside air makes it easier to breath. Maybe it's just me but I always feel like I need more air flow. The valve flaps on the sides come off easy enough to make this a partial non-rebreathable mask which we will be using in such a way. There is a smell with them in the beginning. So, it may be suggested to let them air out for a day and run some air through them for a while first. They will conform to your face the more you use them but right after opening them they are a bit malformed.

This was quicl and easy working with this company the item works well for my needs i just received item havent used very long but seems to hold up ok

Good product. High quality. Comfortable to wear. Good purchase

Well made. Works as expected. I use these for class.

Works great

This came in a pack of 6. Within the first 10 minutes, I had attempted to put 2 on and both broke immediately. The head strap tears thru the plastic mask easily and is useless. The area it attached to is too close to the edge of the mask.

Works great