I second Terry's comments on both counts. Bulk that traps dead air space is
the way to stop conductive loss and that means you need sufficient room to
use same without cutting off circulation of blood.

For teaching snowboarding, where, when working with beginners, a lot of
time is spent not moving around very much, I use a boot that is a half size
too big in order to wear a light wicking sock (CoolMax -- me too) and a
heavy ski sock.

Tommy T.

"Terry Morse" wrote in message
...
(dave) wrote:

has anyone had experience with heat shields (http://www.warmfeet.com)?

No experience with them personally, but they appear to be simple
radiant heat shields. I'm skeptical, since they don't provide any
conductive insulation to speak of. To prevent conductive heat loss,
consider a neoprene layer on the outside of the boot:

http://www.1-outdoors.com/Dry-Guy-Bootglove-Alpine.asp

I've been using a thick CoolMax sock liner under wool mountaineering
socks for a couple of years, and my cold toe problems haven't
resurfaced. You may not have enough space in your boot for that much
sock, though.
--
terry morse Palo Alto, CA http:/www.terrymorse.com/bike/