Thigh high, light weight ribbed Merino wool stockings. Two sizes available- small fits approximately shoe size 6-8 and large fits 9-11. These come in 4 solid colors.
These are thin, warm, and have splendid ribbing.
Historical Note: In 1759 Jedediah Strutt patented a machine to produce ribbing on frame knit hosiery. He set up business in Derby, UK consequently his worsted (wool) stockings were referred to as "Derby Rib".