Run with the minimalist skills of Smartwools Running Ultra Light Micro sock. Focus is on a non-cushion, seamless fit and moisture management for total concentration on the path ahead. Two percent of the sale goes directly to the Smartwool Breast Cancer Fund. Product features include: Made with New Zealand Merino wool, Fabric is 62 percent wool, 36 percent nylon, and 2 percent spandex, Pre-pack of 3 socks, Flat-knit toe seam.