Amazon describes these K. Bell socks as 73% Polyester/ 24% Cotton/ 2% Spandex/ 1% Rubber.  In truth, they have no cotton; their make-up consists of 65% Polyester/ 32% Olefin/ 2% Spandex/ 1% Rubber.  I would have been happy if they did contain cotton instead of olefin because that's why I bought them.  Well, the socks arrived today and I haven't worn them yet, but I'm satisfied with the appearance and texture and believe that they'll be comfortable to wear.  Bottom line, it's an inexpensive sock that appears to be of good quality.  I looked up the definition of olefin at [...] and was satisfied with the description, production, and applications of this ethylene or polyethylene fiber.

Appearance: Seven pairs are white; the remaining pairs include black, lime green, red, light blue, and pink.  Most of them have a weave that is uniformly thin, but considerably thicker than nylon.  If you're familiar with the gold or silver toe socks that they sell at Sears and JC Penney, that's about how "thick" these socks are.  That thin weave runs along the length of the sock, which will make it easy to stretch over the foot when you get into them.  Three of the white pair have the thin weave along the sole and a contrasting diamond pattern along the upper foot that reminds me of thermal underwear.  Because I like the look and feel of these synthetic Ped-like K. Bell socks I'm going to see if they also make nice crew socks.