I only wear one when it’s -20 C or colder (-4 F) and I am covering a lot of ground on a snow machine. I have worn it while sleeping in sub-zero temperatures too, but found it too hot. Mine is fleece lined wool with 3M thinsulate insulation.
Otherwise...
• They are too hot once you start moving and your head will sweat profusely.
• If it’s cold enough frost will accumulate on your eye lashes, making it difficult to blink or see.
• Sunglasses or other eye protection will fog up quickly and need to be removed.
With wind you risk frost bite on your face and that is where the strength of the balaclava comes in, otherwise I focus on keeping my core warm and leave my face exposed.
__________________
"Nothing is good or bad, but thinking makes it so."
William Shakespear
|