UGG Slippers for Men
I own a pair of UGG Slippers - the Ugg Ascott. I can attest from frequent wear that an UGG slippers will keep your foot really warm. More than warmth, though, the shearling inside the slipper just feels so incredibly good against the foot. So, if you're in the market for a warm, soft slipper - give some serious consideration to one from UGG. They are more expensive than many other slippers you'll find, but I suspect you'll find them well worth it.
All of these slippers are available through Zappos, which provides free-return shipping in case you need to send them back.