Western Mountaineering compared to Carinthia military : Down or Synthetic sleeping bag?

Possibly the world's most expensive sleeping bags for the given temperature ratings are from Western Mountaineering and the question is if these mountaineering sleeping bags are worth the extra money you pay for them in comparison to the competitors' alternatives. In the video, the Sycamore model sleeping bag rated to -4 Celsius or 25 Fahrenheit is reviewed in terms of its size, and an illustrative comparison to the -8 degree rated Celsius Carinthia Defence 4 bag with its internal Tropen sleeping bag is reviewed. Carinthia is an Austrian outdoor equipment company mostly known for its synthetic G-loft filler insulation material used in military sleeping bags and different garments. #westernmountaineering #sleepingbag #down #synthetic