I'm glad to see the vapor barrier comments. I got into the Stephensons (warmlite.com) site recently and got interested. Their theories sound good but I still wondered about comfort. I did order some of their material and made a bag liner. Seems to work if I can get used to feeling damp. Like Tom said, It is an "acquired taste". I would be interested in other comments, experiences, etc. <br>This is my first post but I have been reading the forum for some time. A very knowledgeable group.<br>Terry