Knitting Factory Button Boot Socks with String and Lace Trim (Emerald). Cotton blended+Lace 95% Cotton 5 % Spandex. Item can keep warming, protect your legs. Create Pin worthy outfits! Snuggling on the couch never looked this good, or was this cozy either!. Easy Care: Machine-washable, extremely color-fast and very resistant to deterioration from sunlight exposure. 20 Inches Long.