BTime To Run Performance Coolmax Running Sock Pack Of Two ReviewbP PP Time To Run Performance Coolmax Running Sock Pack Of Two PLycra ankle cuff contains excellent stretch properties to help prevent the sock sliding down.PTerry pad provides protection against both impact and abrasion.PY Heel construction-provides a better fit for optimum comfort and performance.PSupport zone containing lycra which helps the sock to remain in place and giving a firm, supportive fit around the arch of the foot.PA flat toe seam to help prevent blisters.