Best bags in the industry
I love these bags. I have the Summerlite which is very similar to this bag but not as wide. WM uses the best down available, their testing of down usually exceeds a 900 and sometimes 930 fill rating. They base the warmth of their sleeping bags on an 850 fill which is why their bags are always warmer than what they say. My bag is rated at 32 degrees but it feels more like a 25 degree bag. If you haven't experienced a WM bag, then you haven't experienced a good nights rest in the BC.