I am sick right now so my backpacking trip is delayed but I went over to my local park to test out my new Underquilt. It is exactly what I wanted, my only concern is how bulky it is in my pack. It takes up about a third of the pack volume. My top quilt is only rated at 30 degrees so I am hoping this Underquilt will make up the difference.
If I feel better tomorrow morning I will head out for an overnight or two.