Enter for a chance to win a Party of Five Mini-Skein Yarn Set in Swell color scheme. The Tough Love Sock yarn is made of 80% superwash merino and 20% nylon, making it the ideal blend of warmth and strength. Because this yarn is spun from 3-plies of merino and nylon, it has quickly become one of the most popular sock yarns from Sweet Georgia Yarns.