Tried these out this week.  -24 below zero not counting wind chill factor.  Outside for several hours in the snow and on the ice.  A lot of me was cold in spite of dresssing appropriately,  BUT NOT MY FEET.  I just wore street socks and my feet stayed warm and dry regardless of how long I stayed outside walking in snow and ice.  Great traction,  comfortable,  great fit,  and looks good too.  I will probably buy another pair to have as a spare !  Too bad Sorel doesn't make snowmobile or snowsuits so the rest of me can stay as warm and dry as my feet did ! !