I wonder how would Blizzard bags compare to Heatsheets bivvies and blankets?
One thing I noticed is Blizzard bags and blankets are significantly heavier then Heatsheets.
Blizzard bag (12.3 oz) vs Heatsheets Bivvy (3.9 oz)
Blizard blanket (18.7 oz) vs Heatsheets blanket (2.9 oz)

However, it seems like the Blizzard products are also warmer.

Would this be the general consensus?