I normally wouldn't write a review for slipper socks, but for these I'm making an exception.  They are hands down the most comfortable and warm slipper socks I've ever owned.  I've always had issues with other slipper socks either being too thin (cold feet), too slippery (stair hazard), too flimsy (falling apart after a few washes or easy to get holes), too short (giving cold ankles) or too tight (leaving indent marks on skin and cutting circulation).  This brand, however, is a little slice of heaven for your feet.  It was a nice surprise trying them on, the insides are soft and fuzzy (like a soft cotton ball) and they definitely keep the warmth in (yes, finally have WARM TOES!).

They are lightly padded but don't feel bulky. You won't even notice the anti-slip bits on the bottom when you walk (some other brands you can feel the bumps down there, not so with these).  They make great slipper socks for relaxing around the house. I don't think they would make good outdoor boot slippers though since the soft fuzzy insides cause your feet to slide around inside them a tiny bit (doesn't affect walking in just the socks, but if you are in boots you want sure footing).  If you are looking for boot socks this manufacturer makes 4 different flavors of these Heat Holder socks (normal socks, these slipper socks, tall socks, and ski socks).  This pair of slipper socks is long enough that you can pull halfway up your calf for extra warmth, and they feel like high quality.

This pair is a winner for cold feet, and would make a great stocking stuffer for either gender (they make a ladies version of these slipper socks, though I suspect they aren't as roomy as the mens version). The only reason I'm giving 4 stars instead of 5 is because they are the most expensive slipper socks I've ever purchased, though I guess you do get what you pay for. :)