If your feet get cold, nothing beats shearling for warming them up.  These slippers are often getting kicked off because my feet get too warm!  I've been wearing them daily for over a month now and they've held up wonderfully. All the shearling STAYS in the slipper (cheaper shearling sticks to your socks or your feet and thins out).

One thing that I don't like (but others might) is that the soles are pretty thick. That means that they'll last a good long time, but I feel that my footfall is a little clunky because of this.

EMU offers great shearling products at very reasonable prices. I have SO many pairs of EMU boots and I trust them to make a warm, comfy environment for my feet.  They've not let me down yet!