SWIFTWICK Pursuit Seven Wool Sock - 7 inchA moderate compression, merino wool, mid calf sock. Moderate compression provides contoured support and prevents bunching Soft, natural Merino Wool throughout the sock wicks moisture to keep you dry and comfortable, year round Channeled Upper provides ventilation to increase breathability Virtually invisible seam eliminates friction in the toebox Flex Zones in key areas, have a half density weave that prevents bunching Y shape heel stitch creates a