6 Nispira HME Heat Moisture Exchanger Filter in-Line Humidification Solution Unit for CPAP biPAP Machine & Mask, Z1, Z2, Dreamstation, Individually Sealed Packaging

These are good for no more than 7 days but they work with travel size CPAP machines. Much better than trying to haul around distilled water and all the added stuff. Humidity levels are such that your not all dried out but some people may find not humid enough for them. I found they work perfectly. I but them keep them on hand for when I travel.

I got this to use on my recent trip to Japan. I didn't want to try to find distilled water, considering I can't read Japanese and was not able to tell what was distilled, purified, or mineral water. On my CPAP I purchased a water tank replacement plug (when installed the resmed machine knows there is no water tank and adjust automatically) using the plug also made the CPAP shorter and easier to pack. No water to carry from place to place, or find. I was there one month and used just one filter. I have the others in reserve for future trips and cruises. Most days I couldn't tell much difference between mouth/nose drying then when using water tank at home.As stated in advertising be sure to use with correct mask/cushion, it will not work with other type masks.I have used other similar filters which attach inline on the hose with good results also, but no longer use that style mask and had to switch to these.

Doctor recommended using these with CPAP while travelling to avoid having to deal with distilled water. I have used these for several weeks and am not sure I notice any benefit. I have also used the CPAP with these or water, i.e. dry, and it seemed the same. Your mileage may vary. It's a plastic tube with a sponge in the middle. Is it a special sponge...I can't tell.

Came apart after first use. I reccomend taping the halves of the plastic container together before using. So far other than having to modify, it seems to help keep moisture in thevsirflow.

Have been using these adapters in place of purchasing a separate humidifier. The size of the adapter is negligible. Beats spending hundreds of dollars on a bulky humidifier.

They split in half. Don't buy this .this isn't merely a durability issue- it's not due to any use case. It's poor manufacturing .They simply fall apart.

Great for travel.

I travel a lot and these are essential when going tinder climates. I don’t wake up with a dry mouth or nose.