They. are. AMAZING!
I got them in my stocking from Santa a couple years ago and have almost lost them to a couple sneaky people who adore them as much as I do. I honestly don't know what it is, but if you try them on, you'll understand their glory.
I think they'll delay my use of heat for awhile. For those of you who know me well, I wait until there is a foot of snow on the ground to finally turn on my heat. What can I say - I prefer saving money and bundling up... especially with my cozy, fuzzy slippers!