I can tell I am getting really tired because my brain isn't wanting to function. You know the soft mink-like material that you can get to put on casts to prevent sores--they have a self sticky type that is available to put on the canula hose for oxygon. The home health nurse gave use some and then Norco provided it after that. We put it on for my husband because he was on 02 all of the time and it did cause sores.