I'll add, as above, Wiggys is the only bag that I'm aware of that you can use when your wet and it's wet, and be warm, as proven by me to me. That is a potentially life saving quality.
As always, use what works for yous.
True. About anytime of year, wool will retain heat even when wet. Even in the summer hypothermia can happen with a storm. Two items to stay warm and dry are what Im wearing now on this chilly summer morning....a wool shirt. For dry, I recommend a light tarp with cord. Sticks and tress can be the tieouts. That increases pack weight to a pound or two more, but it's the most common emergency need in my experience.
