From the website:

“A two ply Sport weight yarn - 1200 yds/lb, 2ply, in 1/2 lb skeins”

“Makes the warmest and most comfortable socks that you have ever put on your feet. This is the perfect sock yarn. the thel (undercoat) is fine and very warm. The overcoat (tog) provides wear resistance. There is no need to add nylon to your socks while knitting. Together they make the warmest most wear resistant socks you ever knitted. The yarn feels rough in the skein but blooms with washing and becomes very soft. This yarn has a nice soft luster. Non elastic, so will not stretch out. Knit elasticity into your socks by ribbing your socks, knit one, pearl one etc.”

“One skein will knit approximately 2 pairs of socks”