Originally Posted by Peter_pan
Try using a rebreather mask in cold weather....You can even have your head under the quilt with no condensation using one of these...Search for info, as this is an old subject that comes up this time of year.
PS... Your lungs will like it too as your moisture is rebreathed in the warmed air, eliminating dry mouth and the shock of breathing cold air.
The only rebreathers I know of are SCUBA and 02 applications... what do you speak of?