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How Can I Keep My Glasses Fog free?

I love being outside when it's cold, especially hiking, and I wear glasses. I have a hard time wearing face masks or balaclavas because my warm breath fogs up my glasses as I breath out into whatever is covering my face. Any suggestions on being fog free?

Question:

Dear Kristin,
I love being outside when it’s cold, especially hiking, and I wear glasses.
I have a hard time wearing face masks or balaclavas because my warm breath fogs up my glasses as I breathe out into whatever is covering my face. Any suggestions on being fog free?

Submitted by - Kevin, Springfield, MO

Answer:

To get the best possible advice, I consulted some of my most trusted four-eyed friends.

Michael Hodgson, is a diehard four-season runner: “I use a microfiber BUFF (www.buff.es) pulled up only over my mouth when I run, so the air going into my lungs remains warm and moist, but the steam from my breath vents out and not directly up into my glasses. When it’s so cold that the nose must be covered, what happens is the moist air is simply venting directly up when you breath, and it condense on the inside of a cold surface – the glasses. You can mitigate this with anti-fog wipes found at most optometrists and some outdoor specialty stores or ski shops – same thing you use inside ski goggles.
 
Shannon Davis, BP senior editor takes a simple approach:  “The faster you go (run, ski, hike, bike, whatever), the more air circulation you’ll get and the less fogging problems you’ll have. Go fast!”

—KRISTIN

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