I don't know what kind of sleeping bags the military uses now. Mine was the '70's version, stuffed with chicken feathers (with a few chickens still attached), and as warm as an ice cube. One time when in the Nat Guard, we were on maneuvers in March and sleeping on cots in the back of a 2.5. We like to have frozen in those bags. The next morning some officer discovered that he'd forgotten something important back at the armory. I quickly volunteered to drive the 50 miles back to get it. I detoured by home and grabbed my good down bag and slept comfortably the next night.
