Socks

This is an excerpt from replant.ca

"Socks are very important.  Buy at least a dozen pairs of light polypropylene 
work socks, and a similar number of pairs of wool/nylon blend thick work socks. 
 The light ones obviously go on first, with the wool on the outside.  This 
setup keeps you from getting blisters, and these types of socks keep your feet 
dry when you sweat, and are warm when wet.  Cotton socks are useless because 
they stay wet, and are cold when wet.  When buying wool socks, try for an 80% 
wool and 20% nylon mix, which will last longer.  Bama socks, or other types of 
polyethylene liners, are also excellent.  A neat trick if you don't like wet 
feet is to put baggies or bread bags between your inner and outer socks.  
Eventually, your feet will still be wet from sweat, but at least this is a 
gradual process, so it isn't as painful and shocking as accidentally dumping 
your foot in a puddle."