I've been using a CPAP since 1998. This year I have finally got a battery and cpap combo that is small enough and light enough to untether myself from campgrounds and the grid electrical supply. I was out camping a couple of weeks ago when the temps got down into the low 20s. My UQ worked wonders and stayed comfy all night long. BUT - I just about froze my face off with the cpap mask and the cold air it was blowing into my nose all night long. I actually had to take it off for a short period of time. Anyone got any good setups for insulating the hose and possibly the cpap unit itself that would allow me to use it more comfortably in very cold temps?