Integral Designs Hot Socks

  The ID Hot Socks are basically like a Primalid for your feet.  My pair weighs 4.7 ounces and are good medicine for somebody who gets cold feet easily.  The bulk of the fabric is Pertex P565, which has a soft feel but is fairly tough (ripstop weave, etc.).  The top band and back are the same stretchy fleece that's on the Primalid.  The bottoms are 500d Cordura and can handle tent or hut time and the occasional walk to relieve yourself in the night.   The fill is 4 oz. Primaloft Sport; a little thicker than the Primalid.
  Some down booties have a slightly stiffened sole, these do not.  This makes them a much better choice for use inside of a sleeping bag.  After a few days out, one of the first places that your bag loses loft is in the foot (particularly in tight quarters).  Hot socks help balance the loss and add a lot of comfort for the weight.  I do, however, generally consider them a luxury item.
  If bringing them, I pack these inside of my sleeping bag and put them on at night after drying my feet and removing wet socks.  If I have spare socks along, a dry pair coupled with the hot socks is tough to beat.  They also make decent puppets if you have small children along.

  The Good:
-Very comfortable
-Good workmanship and materials
-Decent warmth:weight ratio

  The Bad:
-None to date

Bottom Line:  Simple, functional, and warm.  Fairly light.  Not for every trip or person, but if you can spare a few ounces they make tent life a little more enjoyable.  If you plan to stand around in them much, cut some "insoles" out of 1/4" Evazote and drop them in for a little more insulation.   10/10