The pattern suggests using 2-50 gr. skeins stretch sock yarn. Distributed as part of TheKnitter.com Sock of the Month Club with 2 skeins of Trampoline by Skacel Collection.

From the introduction: “The leg on this sock is knit as a rectangle with a heel flap at one end and is turned into a tube with a three-needle bind off. Instep, gusset and sole stitches are then picked up and the foot is knitted in the round.”