Heated Socks

Not exactly equipment, but where else to ask?

I've tried insulated socks that are supposed to wick away moisture and insulated boots supposed to be good to -35F. Still my feet get cold and are moist when I remove the boots.

I'm considering some Firstgear Heated Sock advertised for motorcycle riders, they use 12 volts from the electrical system.
Does anyone have experience with these?

Thanks for your response!
Karl Adlon
NW Illinois

Here's a picture.

Attached Image:

What kind of boots are you wearing? These will keep your feet warm even if they are wet.

http://www.cabelas.com/product/Footwear/Mens-Footwear/Mens-Casual-Shoes/Mens-Pac-Winter-Boots%7C/pc/104797980/c/104747580/sc/104824080/i/103959180/Sorel174-Glacier8482-Boots/722081.uts?destination=%2Fcatalog%2Fbrowse%2F_%2FN-1102516%3FWTz_l%3DSBC%253BMMcat104797980&WTz_l=SBC%3BMMcat104797980%3Bcat103959180

I have not used that particular brand, but I have some 12v socks and vest that work great.

I plug into the scope battery (80 amp hour deep cycle) while observing and unplug while walking about. They make a rechargeable set of batteries that go into the pockets, but I never found the need to buy them when I already have such a large battery at the scope.