teotwaki
Excelsior!
On Denali I used this North Face Heat Exchanger Balaclava to help with the cold dry air and it worked great
QX-Tec Heat Exchanger.
In cold conditions the body goes through several physiological changes. Cold dry air that is inhaled causes dehydration and reduces lung capacity. QX-Tec technology works by warming and humidifying incoming cold air through a unique fin-enabled module. The end result is a warmer core, less peripheral vasoconstriction and prolonged performance.
Can increase temperature (under the module) by up to 2.5 Fahrenheit
Helps keep face dry
Does not impede normal breathing
Features:
Qx-Tec heat Exchange technology
Power Stretch and PowerShield fabrics
QX-Tec Heat Exchanger.
In cold conditions the body goes through several physiological changes. Cold dry air that is inhaled causes dehydration and reduces lung capacity. QX-Tec technology works by warming and humidifying incoming cold air through a unique fin-enabled module. The end result is a warmer core, less peripheral vasoconstriction and prolonged performance.
Can increase temperature (under the module) by up to 2.5 Fahrenheit
Helps keep face dry
Does not impede normal breathing
Features:
Qx-Tec heat Exchange technology
Power Stretch and PowerShield fabrics