I'm going on a winter backpacking trip, and last year I was really cold. It was around 10 degrees and I had a 20 degree bag. I'm using a brand new 20 degree bag this year, and new sleeping pad. I just want to be a little warmer. What liner is best for keeping you warm? I have never used or bought one. I was looking at the Sea To Summit liners, and didn't understand that the silk ones were more expensive, but wouldn't seem to keep me as warm as maybe the fleece. Any thoughts or Ideas?
I like to think I'm pretty tough, and have slept in some really cold nights with just a 20 degree bag, so I'm even willing to go without one again. I would just like to look into the liners and see if there is a noticeable difference.