High performance blend of Ingeo and recycled polyester. High density patterned foot cushion. Dimensional knit for a form fit. Mesh on top and under toes for flexibility and ventilation. Spandex arch support helps hold sock in place. Smooth, flat toe seam for comfort. 42% nylon, 35% Ingeo PLA, 21% recycled polyester, 2% spandex. Limited quantity.