Originally Posted by DataJunkie
I put a set in my clipless shoes. They made a small difference IMHO. However, I am still unable to keep my feet warm after 1 to 1.5 hrs in sub freezing temps. My new set of wool socks made a far greater improvement. My next solution is a larger set of shoes or a set of winter clipless boots. ex: lake shoes
I've also used booties and found them almost worthless.
Have you tried chemical warmer packs? A lot of people recommend the hand size as being plenty big. Riders in my group swear by them. And they obviously work great with the Toasty Feet.
If you use them, be sure to open them in advance and shake them and verify that they activate.