I can guarantee the montbell ex light will be better than the insulator even without the zip
perfect thickness for active layering.
If anyone is looking into like -20c conditions, try the new spyder Bernese jacket. Expensive but it has Pit zips, 750 goose and it is toasty. I can still fit it under 2012 hover shell.
“I train every day of my life as they have never trained a day in theirs.” – Alexander Karelin