I don't intend to open a can of worms here but in all fairness the LL "V" bag is not rated to 20 degrees F. At least not the way other bags are rated. From the LL website. Emphasis is mine:

"Temperature rating on the UltraLite Cot with Cool Mat inside a tent - 20 deg F. "

"Temperature rating on air mattress and no shelter - 45 deg F"



Edited by Trailrunner (03/02/09 10:00 PM)