asylvia wrote:well i've used all three, and all three fit in my nose.....which one is the best, i've still not figured out.
The "best" size is the one that is most comfortable in the snug position and has the best leak parameters...
For "fit"... I have had experience with quite a few mask including the Swift LT and FX which I now have...
If you inspect your Nares (openings) that is the size that will matter most. Lg is the size of your Nares... not your nose overall
The pillows should rest on the Nare opening fully covering and providing a tight seal.
There are some things preventing this:
Each of you Nares will be different sizes and perhaps they are not level.
The shape of your Nares may be slotted... which means that your Nares will have to expand... making it uncomfortable or bad seal.
Nasal hairs can prevent a good seal at times.
Injuries can damage the shape of the opening making seals difficult.
After the sizing then you have to spend a lot of time experimenting with straps on the headgear...
The straps will change the angle of the Pillow as well as the "snugness".
If you are lucky... you will find the right angle and tightness quickly but... there are no perfect rules... You Must Do the Work if you want results.
After Sizing and Position of straps/headgear... then you have do deal with sleeping position/ sleeping pillow.
If you sleep on your back for most of the night... masks will be less of an issue.
If you sleep at all on your side and/or tummy then... it could displace your mask depending.
The FX is pretty light... not the lightest at 83 gms... same as the Zest Nasal Large and about 17 gms heavier than the LT. (light is ideal for movers)
The straps (silicone) of the FX hold the pillows in place pretty good as they don't slide as much as the poly/nylon headgear.
Then sleeping pillows make difference... feather, foam, memory foam, buckwheat hull. There is not one best but there is one that works better with certain masks.
If the choice is between LT and FX... then compare the pillows (I have both masks - brand new). IMHO...
The sizing is the same for Large, Medium and Small on personal inspection and direct comparison.
The silicone pillows on the FX are much thicker material for the base and inner pillow layer.
It has to be... because the pillows on LT are supported by a heavier silicone base.
It also appears that the FX pillows inner membrane is stiffer and heavier material as it does not collapse as easily as the LT by rudimentary testing by myself.
My guess is that ResMed responded to complaints about collapsing pillows and made changes to the Nare molds accordingly.
If you wonder why ResMed does not pull or change the LT mask... my guess is that they still had many satisfied customers who liked the LT just the way it was.
It seems that most masks do not go away unless no one buys them (DME's).
BTW: For myself... I have given up on the LT (It is lighter and quieter) because I cannot get a good seal w/o collapse of the pillows.
I am still working with the FX (about a week) and I think it will work out at this point.
Sorry to go on... but masks are a real interest for me... much more than machines.
Nord