This bag is for people who live in the north for winter…
Design: 2 rectangular bag
Fill: extel insulate level 5
Temperature Rating: -40, 0 fahrenheit
Weight: 15 lbs
Price Paid: $450
This bag is for people who live in the north for winter use. The system has two bags in it, the warmer bag rated to 0 is 44 inches wide and 98 long and has a shoulder baffel and draft tube along with a mummy hood (called 1). Then when the temperature drops you put the second bag inside of the 0 rated one and the combined temperature rating is -40.
Alone bag 2 is rated to 20 and is 39 inches wide and 96 long and has a mummy hood and draft tube. The stuff sack is pretty big, about 10 inches diameter and 25 long but can be compressed to about 20 with the sack. Also this sleep system comes with a totally waterproof bivy sack that's made of Gore-tex, has two poles and a fly. It even comes with a large heat sleep pad that can even be inflated for an airy sleep.
I used it in Alaska when it was -20 out with winds that made the temperature -48. I wore a fleece shirt, socks, and pants and sweated my balls off. The lining is nylon or flannel, your choice.