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Any tips on how to prevent eyeglasses from fogging or developing frost in extremely cold weather. 

CatCrap  (seriously - not a joke) works great

https://www.youtube.com/watch?v=ouaQRP3ADZQ

EGrav wrote:CatCrap  (seriously - not a joke) works great

https://www.youtube.com/watch?v=ouaQRP3ADZQ

+2 above. Use CatCrap skiing and snowboarding with sunglasses all winter long.

walkinman wrote:

EGrav wrote:CatCrap  (seriously - not a joke) works great

https://www.youtube.com/watch?v=ouaQRP3ADZQ

+2 above. Use CatCrap skiing and snowboarding with sunglasses all winter long.

ordered it. Thanks

Richard, anit-fog like CatCrap is only part of the solution. In extreme cold temps a balaclava is necessary, and most will not prevent fogging when wearing glasses unless they have a large downward facing nose shield and mouth breathing holes that allow your warm exhalation to be easily expelled. I have tried many designs over the years...I currently use a Seirus Masque or Ultra Clava, and it worked well at -35F this week with polar bears in the arctic. Slow regulated breathing helps. FYI- ski goggles do not allow your eye to get close enough to the camera viewfinder. 

Best, Chas

Chas wrote:Richard, anit-fog like CatCrap is only part of the solution. In extreme cold temps a balaclava is necessary, and most will not prevent fogging when wearing glasses unless they have a large downward facing nose shield and mouth breathing holes that allow your warm exhalation to be easily expelled. I have tried many designs over the years...I currently use a Seirus Masque or Ultra Clava, and it worked well at -35F this week with polar bears in the arctic. Slow regulated breathing helps. FYI- ski goggles do not allow your eye to get close enough to the camera viewfinder. 

Best, Chas

Thanks Chas

I had lots of problems with fogging last year in the Himalayas so this thread has come at a good time, I will try the catcrap before i go back to Nepal

Dave