The wife has a pair of the black Sorels, rubber on the bottom/cordura on top. Feet were always warm when she was driveing her sled, now that she can't drive a sled (hands won't allow it) and is riding on the back of our I/Q Tour, WHOLE DIFFERENT STORY. Tried the foot warmers, too hot then her feet sweat then get cold. Oh and they bunch up by her toes. Bought soem battery operated socks and never even tried em in boots. Put batteries in em and put my hands in side, couldn't even tell they were warming. And the battery pack is a bit awkward.
So then we purchased a pair of Baffin Impact boots. Well, what with the stellar snow we've had, NOT, she really hasn't had a chance to try them, but holy guacamoly, these things have got to work!!!! Put my hands in em and almost had to run out side!!
But as Chadlyt posted earlier, the work for his wife so I have high hopes.
The next step will be the heated foot bed.
Now we just have to get her hands to warm up. The IQ Touring sleds have BS passenger hand warmers and wind guards. Our previous 2000 Classic 500 Touring had the same passenger hand grips and wind guard but were waaaay warmer. She would usually have to turn them off.