Jawoll - tried and tested a million times and for many years a sock wool classic - including reinforcement yarn for heels and toes to extend the life of your socks! Solid colors of 4 ply fingering weight yarn.  Great for socks or other projects.  

Fiber: 75% wool, 25% nylon
Gauge: 30 stitches per 4 inches
Put-Up: 1.75 ounce wound skein, 229 yds (210m)
Care: Machine Wash cold, tumble dry low